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Keto Mexican Breakfast Casserole

4.4 stars, average of 213 ratings

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This Keto Breakfast Casserole is a great recipe for weekends, brunches, or holidays when you have a house full of family. This is a low-carb breakfast option that everyone will love and doesn’t require a ton of speciality ingredients. You can also use this recipe as a meal prep option since it reheats beautifully in a toaster oven or microwave.

The turnip in this recipe is my favorite part. I love how it mimics potatoes but is keto friendly. Cooking it along with the onion imparts a great flavor combo as well. You can cook the turnip and onion in any oil you wish but my vote is for a little reserved grease from cooking the bacon.

If you’re dairy free you can use unsweetened almond milk and skip the cheese, this will still be one delicious breakfast!

Can I Have Full-Fat Milk on Keto?

Although milk is relatively high in carbs, a small amount of whole milk can be used in recipes. However, if you want to avoid it altogether, you can use 1/3 cup of almond milk, or a combination of 1 tbsp heavy whipping cream mixed with 1/4 cup water.

Hands-on Overall

Allergy information for Keto Mexican Breakfast Casserole

✔  Gluten free
✔  Nut free
✔  Nightshade free
✔  Coconut free
✔  Fish free
✔  Shellfish free
✔  Beef free

Nutritional values (per serving)

Net carbs5.6 grams
Protein26.4 grams
Fat31.8 grams
Calories423 kcal
Calories from carbs 5%, protein 25%, fat 70%
Total carbs7.3 gramsFiber1.7 gramsSugars3.7 gramsSaturated fat11.2 gramsSodium1,254 mg(55% RDA)Magnesium47 mg(12% RDA)Potassium582 mg(29% EMR)

Ingredients (makes 6 servings)

  • 1 lb thick-cut bacon (450 g)
  • 2 tbsp reserved bacon grease or ghee (30 ml)
  • 1 small turnip, diced (300 g/ 10.6 oz)
  • 1 large red onion, thinly sliced (150 g/ 5.3 oz)
  • 3 cups spinach (90 g/ 3.2 oz)
  • 12 large eggs
  • 1/3 cup whole milk (80 ml/ 2.7 fl oz) - see note for substitutions
  • 1 tsp sea salt
  • 1 tsp garlic powder
  • 1/2 tsp black pepper
  • 1/2 cup shredded cheddar cheese (57 g/ 2 oz)
  • Optional: ground cumin and chile powder to taste


  1. Preheat the oven to 200 °C/ 400 °F (conventional), or 180 °C/ 355 °F (fan assisted). Cut the bacon into 2-inch (5 cm) pieces and arrange on a parchment lined baking sheet. Bake for 15 minutes until crisp, ant then remove from the oven. You can use the bacon grease for greasing the pan in the next step. Keto Mexican Breakfast Casserole
  2. Heat the reserved bacon grease in a medium pan over medium high heat. Add in the turnip and onion, cook until soft about 5-7 minutes.
    Keto Mexican Breakfast Casserole
  3. Transfer to a 9 x 13 inch (23 x 33 cm) baking dish. Top the turnip and onion with the spinach. Keto Mexican Breakfast Casserole
  4. Whisk together the eggs, milk, and spices. Optionally, you can add ground cumin and chile powder to taste for more flavor. Pour over the spinach. Keto Mexican Breakfast Casserole
  5. Sprinkle the cheese across the top then arrange the bacon in a single layer across the top of the casserole. Keto Mexican Breakfast Casserole
  6. Transfer to the oven and bake 20-25 minutes or until the eggs are set. Serve. To store, keep refrigerated for up to 5 days. Keto Mexican Breakfast Casserole

Ingredient nutritional breakdown (per serving)

Net carbsProteinFatCalories
Bacon, streaky (high fat content), organic
0 g10.3 g18.8 g211 kcal
Turnip, raw
2.3 g0.5 g0.1 g14 kcal
Onion, red, fresh
1.6 g0.3 g0.1 g10 kcal
Spinach, fresh
0.2 g0.4 g0.1 g3 kcal
Egg, whole, fresh, raw (free-range or organic eggs)
0.7 g12.6 g9.5 g143 kcal
Almond milk natural (unsweetened)
0.1 g0.1 g0.2 g2 kcal
Salt, pink Himalayan rock salt
0 g0 g0 g0 kcal
Garlic powder, spices
0.3 g0.1 g0 g2 kcal
Pepper, black, spices
0.1 g0 g0 g0 kcal
Cheddar cheese
0.3 g2.2 g3.1 g38 kcal
Total per serving
5.6 g26.4 g31.8 g423 kcal

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Lauren Lester
Creator of Healthful Creative

Lauren Lester

Lauren is a food photographer, recipe developer, and author.

She is the founder of the creative content agency, Healthful Creative. HC specializes in helping food centered brands share their story through recipe development + food photography.

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Comments (14)

Great! Made it two weeks in a row!

Thank you!

Hey I was wondering how many servings does this make?

This recipe makes 6 servings (see the list of ingredients for more info).

Hi there
Do you bake the casserole at 400?

Yes, that is correct 😊

Hey there, can this be frozen? I am in a household with just two of us and not sure my husband would eat this. I want to try it but cant eat 6 servings alone.

Hi Amber, although I haven't frozen this recipe, I generally freeze frittatas when making large batches and I think it should freeze well too.

Hi, If I can’t get turnip what substitute could I use ?

Hi Sarah, you can try diced kohlrabi (very similar), rutabaga or even cauliflower. I hope this helps!

How much is one serving size?

Hi Tammy, I'm afraid I don't know the exact grams/ounces but it is one sixth of the casserole 😊

Can I prepare the night before and refrigerate, then bake in the morning? Have you tried this? Does it change the texture of the turnips? Thanks for the recipe!

Absolutely, I've done that with a similar recipe! 😊