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Close up of a scoop of gluten-free corn casserole being served.

Easy Gluten-free Corn Casserole

Sara Vaughn
This easy gluten-free corn casserole comes together fast and makes the perfect gluten-free side dish for Thanksgiving or your next potluck.
Prep Time 10 mins
Cook Time 45 mins
Total Time 55 mins
Course basic
Cuisine American, southern
Servings 8
Calories 187 kcal


  • Cup 1:1 Gluten-free Flour I use King Arthur 1:1 blend.
  • ½ Cup Gluten-free Cornmeal
  • Cup Sugar
  • 1 Tablespoon Baking Powder
  • 1 ½ Teaspoons Salt
  • ½ Teaspoon Onion Powder
  • ½ Teaspoon Garlic Powder
  • 1 Can Cream-style Corn Not drained.
  • 1 Can Regular Corn Drained, or about cup of frozen corn, defrosted.
  • 1 Cup Sour Cream
  • ½ Cup Butter Melted.
  • 3 Large Eggs


Mix the homemade gluten-free Jiffy mix

  • Whisk together the gluten-free flour, cornmeal, sugar, baking powder, and spices in a bowl.
    ⅔ Cup 1:1 Gluten-free Flour, ½ Cup Gluten-free Cornmeal, ⅓ Cup Sugar, 1 Tablespoon Baking Powder, 1 ½ Teaspoons Salt, ½ Teaspoon Onion Powder, ½ Teaspoon Garlic Powder
  • Melt the butter and then add it along with corn, sour cream, and eggs to the bowl of the dry ingredients.
    1 Can Cream-style Corn, 1 Can Regular Corn, 1 Cup Sour Cream, ½ Cup Butter, 3 Large Eggs
  • Mix it all together until there are no visible dry ingedients.
  • Transfer the corn casserole mix to a lightly greased 8x8 baking dish and pop it in the oven.


  • Preheat the oven to 375 °F.
  • Place the corn casserole into the oven and bake it for about 45-50 minutes. You will know it is done when the top is slightly golden and the middle is set.


Make corn casserole ahead of time.
This side dish does not work well to make ahead of time and then reheat, but there are some things you can do to help if you really want to prep ahead of time.
  • Mix the dry ingredients the day before. - Measuring out the dry ingredients is what takes the most time. Measuring and mixing this ahead of time means you just have to toss in the wet ingredients and bake when you want it.
  • Mix the casserole, place it in the baking dish, and cover it unbaked in the fridge overnight. - Mixing the entire casserole ahead of time is not ideal, but it doesn't affect the texture too much. Ensure you allow your baking dish to sit at room temperature, so you don't place a cold baking dish into a hot oven. Doing so can increase the chances of the baking dish cracking.
How to make corn casserole in the crockpot.
  1. Mix the gluten-free corn casserole recipe just like you would bake it in the oven.
  2. Lighty grease your crockpot.
  3. Pour the corn casserole mixture into the crockpot.
  4. Cook the corn casserole on high for about 2- ½ hours or on low for about 4 hours.
Storing and reheating corn casserole.
If you have leftovers of this gluten-free corn casserole, it can be stored in the fridge in a container for up to three days. To reheat it, you can either microwave individual portions for about 30-45 seconds or place the dish back into a 350-degree oven for about 10-15 minutes or until warm.
Keyword dairy free corn casserole, gluten free corn casserole, gluten free side dish, gluten free thanksgiving side dish