Below is a curated list of my favorite slow cooker brunch casseroles. These recipes save time and simplify your next brunch by letting the slow cooker do the work. Each casserole can be cooked overnight or prepared ahead and reheated. If you don’t have a slow cooker, you can easily bake any of these in the oven instead.
Table of Contents
What Size Slow Cooker To Use
The recipes below are written for 12 large eggs, which fits best in a 6-quart slow cooker. If you have a smaller slow cooker (for example, a 3-quart unit), you can cut any recipe in half and follow the same method.
Baking Instructions
All of these casseroles can be baked instead of cooked in a slow cooker. Simply assemble the dish as directed, transfer it to a greased 9×13-inch baking pan, and bake at 350°F for about 50 minutes. Baking times vary by oven and ingredient choices, so check for doneness with a knife inserted in the center — it should come out clean.
Tips For A Successful Breakfast Casserole
Follow these simple tips to ensure your slow cooker breakfast casserole turns out well:
- Grease the slow cooker thoroughly. A generous coating of cooking spray prevents sticking. You can also line the insert with parchment paper or use a disposable slow cooker liner for easier removal.
- Allow the casserole to cool completely before removing it from the insert. Cooling helps the casserole set and reduces the chance of it falling apart or sticking.
- Know your slow cooker. Cooking times differ between models—some finish in 6 hours on low, others take 8. Test for doneness by inserting a knife or toothpick in the center; it should come out clean. My experience is about 6½ hours on low.
Storing & Freezing Your Casserole
These casseroles keep well in the refrigerator for up to 4 days. If you have leftovers beyond that, freeze portions for up to 2 months. Thaw overnight in the refrigerator and reheat in the microwave or oven. For meal prep, cool the casserole completely, then slice and freeze individual portions or freeze the whole casserole if your freezer allows.
Top Slow Cooker Brunch Casseroles
1. Slow Cooker Classic Overnight Breakfast Casserole
This classic casserole combines eggs, hash browns, cheese, vegetables, and your choice of meat. It cooks overnight for a ready-to-serve brunch with minimal morning effort.
2. Slow Cooker Bacon Avocado Breakfast Casserole
This bacon and avocado casserole is full of flavor and excellent for meal prep. It can be prepared in a slow cooker or Instant Pot. The recipe is naturally low-carb and keto-friendly; omit cheese to make it paleo or Whole30 compliant.
3. Slow Cooker Denver Omelette Casserole
This casserole includes all the classic Denver omelette ingredients—eggs, ham, bell peppers, and onions—turned into a set-and-forget slow cooker dish. It’s an easy, low-carb option that makes feeding a crowd simple.
4. Slow Cooker California Burrito Breakfast Casserole
Inspired by the California burrito, this casserole swaps in French fries alongside eggs for a hearty brunch option. It’s a satisfying, savory dish that brings the flavors of a beloved sandwich to a shareable casserole format.
5. Slow Cooker Egg White Vegetable Frittata
An egg white frittata is a light, healthy choice—low in calories, sodium, and carbs. Fill it with your favorite vegetables, cook it overnight, and wake up to a nutritious vegetarian breakfast ready to serve.
Bonus – Cinnamon Roll Casserole
This cinnamon roll casserole is an indulgent, egg-free treat that combines store-bought rolls with butter, cinnamon, cream, and vanilla for a dessert-like brunch centerpiece. It has the texture of a bread pudding and requires very little hands-on time in the slow cooker—perfect for holidays or special brunches.
All Brunch & Breakfast Recipes
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