Overnight Breakfast Casserole

The Vegan Overnight Breakfast Casserole is an easy, make-ahead dish that removes the hassle from breakfast.

Overnight Breakfast Casserole

Perfect for busy mornings, brunches, or special occasions, it combines hearty flavors with plant-based ingredients. Prepare it the night before and bake it in the morning for a warm, satisfying meal everyone will enjoy.

Why Make This Recipe

This casserole is hearty, comforting, and versatile. It uses plant-based sausage, vegan egg alternatives, and dairy-free cheese for a flavorful breakfast that feeds a crowd. You can also customize it with your favorite herbs, spices, or vegetables for extra nutrition and taste. Waking up to a warm, ready-to-bake casserole has never been easier—or tastier.

How To Make Overnight Breakfast Casserole

Ingredients:

  • 1 lb plant-based breakfast sausage
  • 2 cups vegan egg substitute (or blended silken tofu)
  • 2 cups vegan shredded cheese
  • 1 tsp dry mustard
  • 1 tsp herbs (thyme, parsley, or oregano)
  • 4 cups cubed bread (vegan; whole grain or sourdough works well)
  • 2 cups unsweetened plant-based milk (soy, oat, or almond)
  • Salt and pepper to taste

Directions:

  1. In a skillet, cook the plant-based sausage until browned. Set aside.
  2. In a large bowl, whisk together the vegan egg substitute, plant-based milk, dry mustard, herbs, salt, and pepper.
  3. Layer the bread cubes in a greased baking dish. Top with the cooked sausage and sprinkle with vegan cheese.
  4. Pour the egg mixture evenly over the layers.
  5. Cover and refrigerate overnight.
  6. Preheat the oven to 350°F (175°C). Bake uncovered for 45–55 minutes, or until golden brown and set. Let cool slightly before serving.
Overnight Breakfast Casserole

Prep Time And Nutrition Facts

  • Prep time: 10 minutes
  • Cook time: 45–55 minutes
  • Total time: ~1 hour
  • Servings: 8
  • Calories per serving: ~380–400
  • Protein: ~15–18g (from vegan sausage and egg substitute)
  • Fat: ~18–22g (depending on vegan cheese and milk)

How To Serve Overnight Breakfast Casserole

Serve warm, garnished with fresh herbs, green onions, or a side of fruit for a bright contrast. Pairs perfectly with coffee, juice, or a light salad for a complete plant-based breakfast experience.

How To Store Overnight Breakfast Casserole

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat slices in the oven or microwave until warmed through. The casserole can also be frozen before or after baking.

Tips To Make Overnight Breakfast Casserole

  • Use slightly stale bread to absorb the egg mixture better.
  • Mix in vegetables like spinach, bell peppers, mushrooms, or tomatoes for added nutrition.
  • Try different vegan cheeses such as mozzarella, cheddar, or pepper jack for varying flavors.
  • For a spicy kick, add jalapeños or cayenne pepper.

Health And Benefits Of This Recipe

This vegan casserole is packed with plant-based protein from vegan sausage and egg substitute. The bread provides complex carbohydrates for energy, while vegan cheese adds flavor and fortified calcium. Adding vegetables boosts vitamins, fiber, and antioxidants, making this a balanced, hearty breakfast.

Variation (If Any)

  • Swap the plant-based sausage with crumbled tofu, tempeh, or a meatless breakfast crumble.
  • Experiment with different bread types: whole grain, sourdough, gluten-free, or even bagels.
  • Add fresh herbs or spices to customize the flavor profile.

FAQs

Can I make this casserole without sausage?
Yes, omit it or use a plant-based alternative like tempeh, tofu, or a vegan breakfast crumble.

How long can I keep leftovers?
Up to 3–4 days in the refrigerator.

Can I freeze this casserole?
Yes! Freeze before or after baking. Thaw overnight in the fridge before baking if frozen uncooked.

What types of bread can I use?
White, whole wheat, sourdough, bagels, or gluten-free bread all work.

Is this recipe gluten-free?
Use gluten-free bread and verify that all other ingredients are gluten-free.

Can I use a different vegan egg substitute?
Yes! Commercial egg replacers, flax eggs, or silken tofu all work. Adjust quantities for proper texture.

What can I add for extra flavor?
Paprika, cayenne, Italian herbs, spinach, tomatoes, or green onions all enhance flavor and nutrition.