How Long To Cook Sliced Brussels Sprouts In Oven?

Short answer: Preheat your oven to 400 degrees Fahrenheit (204 degrees Celsius). Roast sliced Brussels sprouts on a baking sheet for 18-25 minutes, until they are tender and lightly browned.

Roasting Brussels sprouts in the oven brings out their natural sweetness while giving them a delightful, crispy texture. This quick and easy method involves preheating your oven to 400 degrees Fahrenheit (204 degrees Celsius), and spreading out the sliced Brussels sprouts evenly on a baking sheet. The sprouts are then roasted for around 18-25 minutes, or until they have become tender and achieved a slight char. This technique is not only simple, but it also enhances the flavor and nutritional profile of these mini cabbages, making them a go-to for many cooks around the globe.

What Are Brussels Sprouts?

What Are Brussels Sprouts
Brussels sprout

Brussels sprouts are a type of cruciferous vegetable that is scientifically known as Brassica oleracea var. gemmifera. They are part of the same family as cabbage, broccoli, kale, and collard greens. Named after Brussels, the city in Belgium where they are believed to have originated, Brussels sprouts resemble miniature cabbages and grow on a stalk. These vegetables are packed with nutrients including fiber, vitamins C and K, and antioxidants. Brussels sprouts have a somewhat bitter taste, but when cooked correctly, they can develop a rich, savory flavor with a hint of sweetness.

How Long To Cook Sliced Brussels Sprouts In The Oven? 

How Long To Cook Sliced Brussels Sprouts In The Oven
Roasted Brussel Sprouts

>To cook sliced Brussels sprouts in the oven, you’ll need to first preheat your oven to 400 degrees Fahrenheit (204 degrees Celsius). Then, arrange the sliced sprouts evenly on a baking sheet. Roast them in the preheated oven for approximately 18-25 minutes, or until they’re tender and lightly browned. This method will give your Brussels sprouts a delightful caramelized flavor and a pleasingly crisp texture. Be sure to watch them closely near the end of cooking time to prevent them from burning.

How To Cook Sliced Brussel Sprouts In Oven?

Method 1: Garlic Butter roasted Brussel Sprouts: 

Garlic Butter roasted Brussel Sprouts
The Best Garlic Butter Brussels Sprouts

Step 1: Preheat your oven to 475 degrees Fahrenheit.

Step 1:Purchase Brussels sprouts in bulk, bagged, or on the stalk. If they are on the stalk, cut them off. Trim off any woody ends.

Step 2:Slice each Brussels sprout in half and transfer them into a mixing bowl. If some leave fall off, including those in the bowl too.

Step 3:Take a head of garlic and smash it. Trim off the ends of the cloves and peel them. Ensure to either leave them whole or cut them into larger pieces to prevent them from burning when cooking.

Step 4: Add the garlic to the Brussels sprouts in the mixing bowl.

Step 5: Melt 1/4 cup of butter and drizzle it over the Brussels sprouts and garlic. Add in a couple tablespoons of olive oil as well.

Step 6: Season with about 1/2 teaspoon of salt and 1/2 teaspoon of black pepper. Toss everything together until the Brussels sprouts are well coated.

Step 7: Spread the Brussels sprouts out in an even layer onto an ungreased baking sheet.

Step 8: Roast in the preheated oven for 20 to 25 minutes, depending on the size of your Brussels sprouts.

Step 9: During the last 5 minutes of baking, sprinkle about 1/4 cup of Parmesan cheese over the Brussels sprouts.

Step 10: Once the cheese has melted and crisped up, remove the baking sheet from the oven. Your Garlic Butter Roasted Brussels Sprouts are now ready to serve.

Remember, always adjust seasoning to taste after the sprouts are out of the oven, and enjoy your meal!

Method 2: Oven Roasted Brussels Sprouts with Bacon:

Oven Roasted Brussels Sprouts with Bacon
Roasted Brussels Sprouts with Bacon

Step 1: Preheat your oven (the temperature is not specified in your text but typically for roasting Brussels sprouts, it would be around 400-425 degrees Fahrenheit).

Step 2: Prepare the ingredients: you’ll need a pound of Brussels sprouts cut in half, salt and pepper for seasoning, and the rendered fat from cooking eight strips of bacon.

Step 3: Place your prepared Brussels sprouts onto the same cookie sheet you used for cooking the bacon.

Step 4: Drizzle the reserved bacon fat over the Brussels sprouts.

Step 5: Sprinkle your mix of salt and pepper onto the Brussels sprouts.

Step 6: Use your hands or a spatula to mix everything. Ensure that each sprout is well coated with the bacon fat and seasoning.

Step 7: Arrange the Brussels sprouts cut side down on the cookie sheet, ensuring they’re not touching. Avoid overcrowding the pan as this could lead to steaming instead of roasting.

Step 8: Place the cookie sheet in the oven to roast. Halfway through, give the sprouts a little stir to ensure all sides brown evenly.

Step 9: Once the Brussels sprouts are golden and crispy, remove them from the oven.

Step 10: Sprinkle the cooked bacon over the roasted Brussels sprouts.

Method 3: 

Step 1: Preheat your oven to 400 degrees Fahrenheit.

Step 2: Rinse your Brussels sprouts under cold water and dry them off well. If they are not dried sufficiently, they will end up steaming instead of roasting.

Step 3: Trim off the ends of the Brussels sprouts, then slice them down the middle lengthwise.

Step 4: Place the prepared Brussels sprouts into a large bowl.

Step 5: For every pound of Brussels sprouts, drizzle over one teaspoon of olive oil, half a teaspoon of kosher salt, fresh black pepper to taste, and half a teaspoon of garlic powder.

Step 6: Toss everything together using your hands, ensuring a light coating of oil and seasonings on all Brussels sprouts.

Step 7: Pour the Brussels sprouts onto a rimmed baking sheet, arranging them cut side down. This helps the cut side to get caramelized and the tops to become crispy.

Step 8: Place the baking sheet in the preheated oven and roast for 30 minutes.

Step 9: After 15 minutes (the halfway point), remove the sprouts from the oven and give the baking sheet a good shake to move the sprouts around. Do not flip them over.

Step 10: Put the sprouts back into the oven to finish roasting for the remaining 15 minutes.

Step 11: Once roasted, the sprouts should have crispy outer leaves and caramelized bottoms. Finish them off with a little more kosher salt sprinkled over the top.

Brussel Sprouts Pan-Seared With Butter

Brussel Sprouts Pan-Seared With Butter
Sauteed Brussel Sprouts Recipe with Butter and Garlic

Step 1: Heat a nice pan over medium heat. Make sure it’s hot, but not too hot to avoid burning the Brussels sprouts.

Step 2: Cut your Brussels sprouts in half and remove the end knobs if they’re still there.

Step 3: Dip the Brussels sprouts in a couple of tablespoons of butter.

Step 4: Season them with salt and pepper. Be careful with the salt to prevent over-seasoning.

Step 5: Place the Brussels sprouts cut side down in the hot pan.

Step 6: Let them sear until they’re done on one side (check by lifting one with tongs). Avoid burning them – there’s a fine line between well-seared and burnt.

Step 7: Once one side is done, turn every Brussels sprout over using tongs.

Step 8: While the other side is searing, sprinkle a bit of chopped white onion over the Brussels sprouts.

Step 9: Sprinkle half a teaspoon of paprika and a light sprinkling of garlic powder over the top of the sprouts.

Step 10: Stir everything around a bit to evenly distribute the onions and spices.

Step 11: Make sure the onions get a bit of caramelization as well.

Step 12: Keep an eye on the Brussels sprouts to avoid burning them, stir occasionally.

Step 13: Once they are nicely browned and not burnt, remove them from the pan and serve.

Air Fryer Brussel Sprouts[/su_heading]

Step 1: Mince three cloves of garlic.

Step 2: Trim your Brussels sprouts by cutting off the little end of the stem and then cut them lengthwise from the stem right to the end, halving them. Also, peel off the outer layers of each half. This step allows you to avoid washing the sprouts, which can introduce unwanted moisture.

Step 3: Transfer these Brussels sprouts into a mixing bowl along with the minced garlic.

Step 4: Season the Brussels sprouts by adding two tablespoons of olive oil, one tablespoon of balsamic vinegar, one teaspoon of salt, and half a teaspoon of black pepper. Give them a nice toss to ensure even coating.

Step 5: Transfer the sprouts into the air fryer basket, making sure to include all of the minced garlic. Try to spread the sprouts out a bit in the basket.

Step 6: Remove any loose leaves that fall off during the tossing process. These will be added back halfway through the cooking time to avoid them getting burnt.

Step 7: Place the Brussels sprouts in the air fryer, setting the temperature to 400 degrees Fahrenheit and the cooking time to 15 minutes.

Step 8: Halfway through the cooking time, remove the sprouts, shake them up, and add the loose leaves back in. Continue the cooking time.

Step 9: Once the cooking time is up, remove the Brussels sprouts from the air fryer and place them back into the mixing bowl.

Step 10: Finish off by adding one more tablespoon of balsamic vinegar and giving them another toss.

How To Blanch And Freeze Brussel Sprouts?

Step 1: Start by cutting the Brussels sprouts off their stalks.

Step 2: Bring a pot of water to a full rolling boil.

Step 3: Carefully add the Brussels sprouts to the boiling water, ensuring to do so away from you to avoid getting burnt.

Step 4: Blanch the Brussels sprouts in the boiling water for three minutes.

Step 5: After three minutes, remove the Brussels sprouts from the boiling water and immediately immerse them in an ice water bath. This step is crucial as it helps set the color of the sprouts and kills enzymes that would cause them to deteriorate.

Step 6: Keep the Brussels sprouts in the ice water bath for an equal amount of time that they were boiled, which is three minutes in this case.

Step 7: After three minutes in the ice water bath, remove the Brussels sprouts and let them drain.

Step 8: Place the Brussels sprouts on a dehydrator tray or a similar surface to allow any excess water to drain off. You can even pat them dry with a towel to remove as much moisture as possible.

Step 9: Once the Brussels sprouts are fully drained and dry, pack them into vacuum-sealed bags or freezer-safe containers.

Step 10: Label and date your bags or containers before placing them in the freezer. This step ensures that you can easily identify them later and know when they were frozen.


How do you know that Brussels sprouts are bad?

Brussels sprouts are bad when they show visible signs of mold, have a strong unpleasant odor, or if the leaves have turned yellow or brown. Also, if the sprouts are very soft or slimy, they have likely gone bad and should not be consumed.

How long does it take to boil Brussels sprouts?

The time it takes to boil Brussels sprouts can vary depending on their size. Small sprouts usually take 7-10 minutes to become tender, while larger ones can take up to 15 minutes. Always check them for tenderness by piercing them with a fork.

How long do you cook Brussels sprouts at 350 in an air fryer?

When cooking Brussels sprouts in an air fryer at 350°F, it generally takes around 15-20 minutes to get them nicely roasted and crispy. This can vary depending on the size of your sprouts and the specifics of your air fryer. Always check for doneness by checking their color (golden brown) and texture (crispy outside, tender inside).

How do you know when Brussels sprouts are cooked?

Brussels sprouts are cooked when they are tender enough to be easily pierced with a fork, and their color has turned bright green. If roasting, they should have some brown, caramelized spots.

Do you flip Brussels sprouts in the oven?

Yes, flipping Brussels sprouts while roasting them in the oven helps them to cook evenly and achieve a nice caramelization on all sides. This is typically done about halfway through the roasting time.


Cooking Brussels sprouts can be a quick and easy process, whether you’re boiling, air frying, or roasting them.
They take usually 18-25 minutes to roast. Recognizing when they are cooked is as simple as checking for a tender inside and a crispy, golden outside. Remember, even cooking times can vary depending on the method and the size of the sprouts, so keeping a close eye on them during the cooking process is key.