Make-Ahead Overnight Breakfast Casserole Recipe for Busy Mornings

This healthy overnight breakfast casserole may become your new favorite breakfast or brunch dish.

5 ingredient overnight breakfast casserole

This simple French toast-style breakfast casserole is made by combining the ingredients in a pan and letting it rest in the refrigerator overnight. In the morning you bake it and enjoy—a perfect make-ahead for busy weekdays or leisurely weekends.

Overnight casseroles are especially handy for brunches, potlucks, sleepovers, or when you want a stress-free meal for house guests. I do the prep the night before whenever I expect company so the morning is calm and quiet.

Also try this Protein Banana Bread

Overnight breakfast bake variations

Apple Cinnamon: Substitute chopped apples for the berries and add a teaspoon of cinnamon to the milk, or use cinnamon raisin bread.

Chocolate Chip: Sprinkle mini chocolate chips or chopped dark chocolate over the casserole right before baking.

Tropical: Swap the berries for canned diced pineapple, use coconut milk, and add about 1/2 cup shredded coconut with the bread.

Banana Bread: Replace the berries with sliced bananas and use 2/3 cup mashed banana instead of applesauce. Add a teaspoon of cinnamon and optional chocolate chips.

Pumpkin Pie: Use canned pumpkin instead of applesauce and stir in 1/2 teaspoon cinnamon plus 1/2 teaspoon pumpkin pie spice. Use blackberries, bananas, or omit fruit altogether.

Cinnamon Roll: Make the apple version, then drizzle a cream cheese or powdered sugar glaze over the baked casserole instead of syrup. For a simple glaze, whisk 1 1/2 cups powdered sugar with 2 tablespoons milk and 1/4 teaspoon vanilla, thinning as needed.

Serving Suggestion: Tofu Scramble Recipe

Step by step recipe video

Watch the quick video above to see how simple this overnight casserole is to prepare.

Healthy breakfast casserole ingredients

This recipe uses just five core ingredients for an easy, nutritious breakfast: bread, berries, applesauce or banana, milk, and a liquid sweetener. Optional additions include egg whites, vanilla, and a pinch of salt.

Use whatever fruit you have on hand—berries are classic, but peaches, pears, mango, or pitted cherries work beautifully. If using frozen fruit, thaw completely and blot away excess moisture to avoid a soggy casserole.

Choose a liquid sweetener such as pure maple syrup, agave, or honey. For a vegan version, use plant-based milk and egg-free alternatives; for a gluten-free casserole, choose gluten-free bread.

What type of bread is best?

For best texture, use a thick, crusty bread such as brioche, challah, sourdough, or a crusty French loaf. These breads hold up well when soaked overnight. Note: brioche and challah often contain eggs.

Sandwich-style white or whole wheat bread will work but can yield a moister, slightly denser result. If your bread isn’t stale, leave it uncovered for a day or dry slices in a 300°F oven for about 15 minutes to remove excess moisture.

How to make an easy breakfast casserole

Overnight casseroles are easiest when made with slightly stale bread. If needed, dry the bread ahead of time by leaving it uncovered or baking at 300°F until just dry.

Grease a 9×13-inch baking pan (or halve the recipe for an 8-inch pan). Cut the bread into 1–2 inch pieces and spread them evenly in the pan.

Whisk together applesauce (or mashed banana), milk, egg whites (or extra milk), maple syrup (or other sweetener), and vanilla in a measuring cup. Pour the mixture evenly over the bread, then scatter the berries on top.

Cover and refrigerate overnight. In the morning, preheat the oven to 350°F, uncover the pan, and bake on the center rack for about 1 hour or until the top is lightly golden. Let cool slightly before slicing and serving.

French toast casserole tips and tricks

Top servings with pure maple syrup, fresh fruit, powdered sugar, or coconut whipped cream. Serve warm or cold, in bowls or on plates.

Store leftovers covered in the refrigerator for up to five days, or portion into containers for meal prep. The casserole also freezes well—slice and freeze in an airtight container for up to three months, then thaw overnight or in the microwave.

This dish makes a lovely breakfast in bed for special occasions like Mother’s Day, Father’s Day, Valentine’s Day, or a relaxed weekend morning.

Breakfast casserole health benefits

A typical slice provides calcium, potassium, iron, fiber, and about seven grams of protein, while remaining low in calories per serving. The recipe can be adapted to be egg-free, dairy-free, gluten-free, low-fat, low-calorie, oil-free, refined-sugar-free, cholesterol-free, and fully vegan depending on ingredient choices.

This casserole was inspired by a combination of vegan French toast and baked oatmeal ideas.

More Healthy Make Ahead Breakfasts

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Healthy Blueberry Muffins

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Healthy Banana Bread