Brussel Sprout Casserole Recipe
Easy Brussel sprout casserole recipe made with fresh Brussel sprouts lightly roasted and baked with a creamy parmesan cheese sauce.
Prep Time15 minutes mins
Cook Time25 minutes mins
Total Time40 minutes mins
Servings: 4 servings
Preheat the oven to 425°F.
Place brussel sprouts in a 8 x 11 casserole dish, drizzle with olive oil and season with salt, pepper, and garlic powder. Toss to coat evenly, and then bake until tender, about 10-15 minutes, depending on the size of your brussels, tossing halfway through.
In a small saucepan over medium heat, melt the butter. Add the onions and cook until translucent, about 5 minutes. Add the flour and mustard powder and stir until the flour dissolves, about 1-2 minutes. Slowly pour the milk and stir with a wooden spoon until the sauce thickens. Turn off the heat, add ¼ cup parmesan cheese and stir until well blended.
When the brussel sprouts are done roasting, pour the sauce over the brussel sprouts. Sprinkle the remaining parmesan cheese on top.
Return the brussel sprouts to the oven and cook until the cheese is melted and bubbly, 10- 15 more minutes. Serve immediately.
- My Top Tip: Remove the outer leaves of the sprouts before roasting them. These leaves can be dry and tough, so just peel them off before you cut the brussel sprouts in half.
- Storage: Store any leftovers in an airtight container. They will last up to 3 days in the fridge.
- Freezing: Let the casserole cool completely before wrapping the dish in foil and placing it in a freezer bag. It will keep well for up to 2 months and can be thawed in the fridge overnight before reheating.
Substitutes: For best results, follow the recipe as is. However here are some common substitutes that would work well in this recipe.
- Instead of regular milk, you can use any unsweetened plant-based milk.
- Instead of gruyere cheese, you can use shredded cheddar cheese or another one you like.
- To make this gluten-free, use an all-purpose gluten-free flour mix. You can also substitute with almond flour.
Serving: 0.25lb | Calories: 210kcal | Carbohydrates: 18g | Protein: 10g | Fat: 12g | Saturated Fat: 5g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Trans Fat: 0.1g | Cholesterol: 26mg | Sodium: 562mg | Potassium: 586mg | Fiber: 5g | Sugar: 6g | Vitamin A: 1151IU | Vitamin C: 97mg | Calcium: 240mg | Iron: 2mg
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