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Home » Low Carb

Tex-Mex Keto Squash Casserole

Published: Nov 7, 2019 • Modified: Jul 13, 2024 by Charlotte• This post may contain affiliate links •2 Comments

10.6K shares
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rotel squash casserole in bowl

This Tex Mex Keto Squash Casserole will make anyone love squash! Featuring yellow squash in a creamy mayo and sour cream base with ro*tel® tomatoes added for a burst of flavor.  The perfect low carb side dish for weeknight or holiday meals.

squash casserole in pan

This recipe originally posted June 2017 and updated with all new photos and step by step instructions. 

Mid summer is the perfect time to experiment with new squash recipes. Seems like everywhere you look, there is summer squash! My market has delicious squash available year-round, so you can have this fabulous squash casserole anytime.  Here's a creamy, tex mex take on the traditional squash casserole that comes together in a snap. Bonus:  this recipe is also low carb! I used mild ro*tel® in my recipe and it worked great with the creamy ingredients to make a delicious side dish.

This casserole makes a great meal to take to someone with diabetes. Pair it with a rotisserie chicken and wheat rolls and the meal is done! I used a few chopped onions on top for a dash of color.  Other options include chives or even bacon bits.  Feel free to experiment with your favorite topping ideas.

Why this recipe works

  • The squash is cooked in a skillet initially to help draw liquid out which will keep the casserole the proper texture.
  • Ro*tel® tomatoes and chilies are used in the recipe to give the casserole a delicious Southwest flovor.
  • Sour cream and mayo lend a creamy base to the recipe.

The main ingredients

  • Yellow summer squash- you can find yellow squash year round in the market. Look for the smallest squash for best results.
  • Tomatoes and chilies- I chose the mild version but feel free to use the original version if you prefer.
  • Cheddar cheese- I like to use sharp cheese for cooking as it adds a nice flavor.  Use your favorite.
  • Sour cream- Reduced fat or regular sour cream work equally well.
  • Mayo- choose you favorite mayo.
bowls of ingredients for squash casserole

Ingredients for Tex Mex Squash Casserole

How to make this recipe

  1. Start by cooking the squash and onions in a skillet to cook off some of the liquid in the squash. (photo 1)
  2. The squash will start to become softer as it cooks. (photo 2)
  3. Place squash/onion mixture in a mixing bowl and add other ingredients including part of the cheese. (photo 3)
  4. Stir to combine then pour into casserole dish for baking. (photo 4)
sliced squash and onions
photo 1
sautéed sliced yellow squash and onions in mixing bowl
Photo 2
sliced yellow squash, rotel and sour cream in mixing bowl
Photo 3
squash casserole steps
Photo 4

Expert tips for making keto squash casserole

  1. Start by pre-cooking the squash in a pan rather than boiling it.  This will help reduce the moisture in the squash and help keep the casserole from being watery.
  2. Drain the can of tomatoes and chilies well- to help reduce moisture in the casserole.
  3. Use sharp cheese for best flavor.
squash casserole in pan

Frequently asked questions

How many carbs are in this squash casserole?

This squash casserole contains about 9 gm carb/serving.

Can you make this casserole ahead of time?

Due to moisture in the squash, it is best to prepare this casserole and bake immediately.

How do you store leftovers?

 Cover any leftovers and place in the refrigerator.

What meat goes with squash casserole?

Rotisserie chicken is a favorite.  Also, meatloaf, roast, roasted chicken, or pork tenderloin would be a great entree. 

squash and rotten casserole

Hope you enjoy this recipe! Be sure to check out my other low carb favorites:

  • Cauliflower Crunch Salad
  • Pork Tenderloin with Spanish Cauliflower Rice
  • Layered Mediterranean Salad

Did you make this recipe? Please leave your star rating and comment below!

Recipe

squash casserole in pan

Tex-Mex Keto Squash Casserole

Cheesy, creamy and low carb squash casserole makes the perfect side dish.
4.27 from 119 votes
Print Pin Rate
Course: Side Dish
Cuisine: American
Prep Time: 15 minutes minutes
Cook Time: 20 minutes minutes
Total Time: 35 minutes minutes
Servings: 8
Calories: 248kcal
Author: Easyhealth Living

Ingredients

  • 1 teaspoon olive oil
  • 2 pounds summer squash, sliced
  • 1 cup diced onion
  • 1 can ro*tel tomatoes, drained may use mild if desired
  • 1 ½ cups cheddar cheese,grated reserve ½ cup for topping
  • ½ cup sour cream
  • ½ cup mayonnaise
  • ¼ teaspoon salt
  • ¼ teaspoon black pepper
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Instructions

  • Preheat oven to 350 degrees.
  • Heat oil in a large skillet then add squash and onions. Cook and stir occasionally until tender - about 8-10 minutes. Drain any liquid from squash.
  • In a large bowl, stir together drained squash/onion mixture and remaining ingredients (reserve ½ cup cheese). Adjust salt and pepper if desired.
  • Pour mixture into a medium sized casserole dish and sprinkle with reserved cheese.
  • Bake until cheese is melted and casserole is bubbly-about 20-30 minutes.  Allow to set 5-10 minutes.

Notes

Expert tips for making squash casserole
  1. Start by pre-cooking the squash in a pan rather than boiling it.  This will help reduce the moisture in the squash and help keep the casserole from being watery.
  2. Drain the can of tomatoes and chilies well- to help reduce moisture in the casserole.
  3. Use sharp cheese for best flavor.
Nutrition Facts
Tex-Mex Keto Squash Casserole
Amount per Serving
Calories
 
248
Calories from Fat 189
% Daily Value*
Fat
 
21
g
32
%
Saturated Fat
 
8
g
40
%
Cholesterol
 
36
mg
12
%
Sodium
 
313
mg
13
%
Potassium
 
464
mg
13
%
Carbohydrates
 
9
g
3
%
Fiber
 
2
g
8
%
Sugar
 
5
g
6
%
Protein
 
8
g
16
%
Vitamin A
 
598
IU
12
%
Vitamin C
 
26
mg
32
%
Calcium
 
206
mg
21
%
Iron
 
1
mg
6
%
* Percent Daily Values are based on a 2000 calorie diet.
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10.6K shares

Comments

  1. Jen says

    April 10, 2023 at 7:53 pm

    5 stars
    This has so much flavor!! After I cooked the squash , I moved it to a colander to drain. While that was sitting I cooked up some cubed chicken with a little chili powder. Added the chicken in with the mixture and baked all per recipe.

    Reply
  2. Gigi says

    August 06, 2024 at 12:19 pm

    I added some cooked diced chicken and some garlic powder 😋 turned out great !!

    Reply
4.27 from 119 votes (118 ratings without comment)

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Hi, I'm Charlotte

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