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Broccoli Onion Casserole – favorite healthy side dish

Broccoli Onion Casserole

Broccoli Onion Casserole recipe is a comforting, easy to make dish that works for weeknights as well as holidays side dish. Plus, this is a healthy dish loaded with wholesome vegetables and some protein from cheddar cheese homemade creamy sauce.
Prep Time 20 mins
Cook Time 30 mins
Total Time 50 mins
Course Side Dish
Servings 4 people
Calories 103 kcal


  • 1.2 lb 550 g broccoli florets
  • 1 large 260 g onion, sliced
  • 2 tbsp. 10 g olive oil
  • 3 tbsp. 25 g. butter
  • 2 tbsp. 25 g. all-purpose flour
  • 1.5 cup 355 ml. milk (any kind will work)
  • 1.5 cup 100 g. grated cheddar cheese, fat reduced
  • ½ tsp. garlic powder
  • ½ tsp. onion powder
  • ½ tsp. oregano
  • ¼ tsp. black pepper
  • ½ tsp salt or to taste
  • 1/4 cup 25 g. crumbled croutons


  • In a large pot, bring water to boil, add the broccoli florets and boil for 2 minutes. Drain the broccoli in a colander and rinse with cold water to stop the cooking process.
  • Place the broccoli in a medium casserole dish; set aside.
  • Heat a medium saucepan on medium-high, melt the butter, then add the flour and cook, stirring, until it turns to light golden. Gradually pour in the milk while whisking.
  • Add garlic powder, onion powder, oregano, salt, and pepper. Continue cooking about 2 minutes, stirring occasionally, until sauce is thickened and bubbly.
  • Remove from the heat and add the cheddar cheese; stir until completely melted.
  • Pour the sauce evenly over the broccoli.
  • Heat a medium skillet over medium-high heat, add the olive oil and onion. Cook onion, stirring occasionally until golden.
  • Sprinkle the onion evenly on top of the broccoli casserole. Top with crumbled croutons and bake about 30 minutes until golden brown and bubbly.
  • Remove from the oven. Serve hot and enjoy!


How Many Calories in Broccoli Onion Casserole
Calories (per 100 g): 103 cal Calories (per 1 serve, 275 g): 285 cal
Fat: 5.0 g Fat: 13.8 g
Carbohydrates: 10.2 g Carbohydrates: 28.1 g
Protein: 5.5 g Protein: 15.1 g
Keyword Broccoli onion casserole,broccoli casserole recipe,healthy broccoli casserole,comforting dish,easy to make dish,weeknights meal,holiday side dish