This Bisquick Breakfast Casserole is a hearty, cheesy, and savory dish perfect for busy mornings, brunch gatherings, or meal prep. Packed with sausage, veggies, hash browns, and melty cheddar, it’s easy to make and satisfying for the whole family.

Ingredients

1 lb (450 g) breakfast sausage (pork, chicken, or turkey)
1 medium bell pepper (red, yellow, or orange), diced
1 small yellow onion, diced
1 ½ cups frozen shredded hash browns
2 cups shredded cheddar cheese, divided
1 ½ cups Bisquick baking mix
4 large eggs
2 cups (480 ml) whole milk
¼ teaspoon ground black pepper
Salt, to taste

Instructions

1. Preheat and Prepare
Preheat the oven to 400°F (200°C) and lightly grease a 9×13-inch baking dish.

2. Cook Sausage and Vegetables
In a large skillet over medium heat, cook the sausage, breaking it up with a wooden spoon. Add the bell pepper and onion, cooking until the sausage is browned and the vegetables are tender. Remove from heat and set aside.

3. Prepare the Batter
In a large mixing bowl, whisk together Bisquick mix, eggs, milk, and black pepper until smooth.

4. Combine Ingredients
Stir in the cooked sausage mixture, 1 cup of shredded cheddar cheese, and the frozen hash browns. Season with salt to taste. Transfer the mixture to the prepared baking dish.

5. Add Topping and Bake
Sprinkle the remaining 1 cup of cheddar cheese evenly on top. Bake for 35–40 minutes, or until the center is set. For accuracy, the center should reach 160°F (71°C) if using a food thermometer.

6. Serve
Allow the casserole to cool slightly, then serve hot.

Why You’ll Love This Recipe

Quick and easy to prepare with simple ingredients.
Perfect for weekend brunch or busy mornings.
Hearty and filling—packs protein, veggies, and carbs in one dish.
Cheesy and flavorful, appealing to kids and adults alike.
Can be made ahead and reheated for convenience.

Tips

Use freshly shredded cheese for the best melt and flavor.
For extra crispiness, lightly spray the top with cooking spray halfway through baking.
Let the casserole rest 5 minutes before cutting to set properly.
Swap milk for half-and-half for a richer casserole.

Variations and Substitutions

Meat: Use bacon, ham, or sausage alternatives for different flavors.
Vegetables: Add spinach, mushrooms, or zucchini for added nutrition.
Cheese: Try Monterey Jack, Swiss, or pepper jack for a twist.
Gluten-Free: Substitute Bisquick with a gluten-free baking mix.
Dairy-Free: Use dairy-free milk and cheese alternatives.

FAQs

Can I make this ahead of time?
Yes! Assemble the casserole the night before, cover, and refrigerate. Bake in the morning, adding a few extra minutes to the cooking time.

Can I freeze this casserole?
Yes, it freezes well. Freeze before baking in an airtight container for up to 3 months. Thaw overnight in the fridge before baking.

Can I use fresh potatoes instead of frozen hash browns?
Yes, peel and shred fresh potatoes, then lightly parboil or microwave them to soften before adding.

Can I adjust the cooking time?
Bake until the center is set and reaches 160°F (71°C). Cooking time may vary slightly depending on oven and dish size.

Serving and Suggestions

Serve with fresh fruit or a green salad for a balanced breakfast or brunch.
Pair with hot sauce or salsa for added flavor.
Cut into squares for easy meal prep or breakfast on the go.
Garnish with fresh herbs like parsley or chives for a pop of color.