Bisquick Egg Sausage and Mushroom Casserole

Wake up your mornings with this hearty and savory Bisquick Egg Sausage and Mushroom Casserole—an easy, crowd-pleasing breakfast or brunch option that's perfect for busy weekdays or weekend gatherings. Loaded with flavorful browned breakfast sausage, sautéed mushrooms, and tender onions, this dish is topped with melty shredded cheddar cheese and baked to golden perfection. The signature Bisquick batter adds a light, fluffy texture, while the rich egg custard ties everything together. Quick to prepare with just 20 minutes of prep time, this casserole bakes to a satisfying, filling meal in under an hour and serves six. It's the ultimate make-ahead breakfast idea that's as versatile as it is delicious, ideal for holidays or potlucks. Serve it warm with a side of fresh fruit or a crisp green salad for a complete, balanced meal.

Nutriscore Rating: 53/100

Prep Time:20 mins

Cook Time:40 mins

Total Time:60 mins

Servings: 6

Ingredients

• 1 pound Ground breakfast sausage
• 1 cup Button mushrooms, sliced
• 1 cup Shredded cheddar cheese
• 0.5 cup Chopped onion
• 6 count Large eggs
• 1 cup Bisquick baking mix
• 2 cups Milk
• 0.5 teaspoons Salt
• 0.25 teaspoons Ground black pepper
• 1 as needed Non-stick cooking spray

Directions

Step 1

Preheat your oven to 375°F (190°C). Spray a 9x13-inch baking dish with non-stick cooking spray and set aside.

Step 2

In a large skillet over medium heat, cook the ground breakfast sausage until browned and fully cooked, breaking it into crumbles. Remove the sausage from the skillet and set aside.

Step 3

Using the same skillet, sauté the chopped onion and sliced mushrooms until softened, about 5-7 minutes. Remove from heat and combine with the cooked sausage.

Step 4

Spread the sausage, mushroom, and onion mixture evenly across the prepared baking dish. Sprinkle the shredded cheddar cheese evenly on top.

Step 5

In a large mixing bowl, whisk together the eggs, Bisquick mix, milk, salt, and pepper until smooth and well combined.

Step 6

Pour the egg mixture over the sausage and cheese in the baking dish, ensuring it covers everything evenly.

Step 7

Bake in the preheated oven for 35-40 minutes, or until the casserole is set and slightly golden brown on top. To test for doneness, insert a knife in the center — it should come out clean.

Step 8

Remove the casserole from the oven and let it cool for 5-10 minutes before slicing into squares and serving warm.

Nutrition Facts

Serving size	(1016.8g)

Amount per serving	% Daily Value*
Calories	2523.6

Total Fat 185.8g	0%
Saturated Fat 59.1g	0%
Polyunsaturated Fat g
Cholesterol 1434.3mg	0%
Sodium 7026.9mg	0%
Total Carbohydrate 102.6g	0%
Dietary Fiber 4.4g	0%
Total Sugars 7.6g
Protein 105.7g	0%

Vitamin D 254IU	0%
Calcium 571.2mg	0%
Iron 15.4mg	0%
Potassium 2173.7mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 66.7%

Protein: 16.9%

Carbs: 16.4%