Cheesy Cauliflower Casserole--a low carb twist on the classic mac n cheese
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4.75 from 4 votes

Cheesy Cauliflower Casserole | Low-Carb, Keto

Loaded to the brim with gooey, cheesy goodness, this cheesy cauliflower casserole is the perfect low-carb and keto friendly macaroni and cheese substitute.
Prep Time10 mins
Cook Time15 mins
Total Time25 mins
Course: casserole
Cuisine: vegetable side dish
Keyword: keto, ketogenic, low carb
Servings: 6 servings
Calories: 346kcal


  • 1 whole head of cauliflower , cut into florets
  • 1/2 tsp salt
  • 1 cup heavy cream
  • 2 oz cream cheese
  • 2 tsp dijon mustard
  • 2 cups shredded cheddar cheese , divided
  • salt and pepper to taste
  • 1 tsp garlic powder


  • Preheat oven to 375 and grease a 9x9 glass baking dish
  • Bring large pot of water to a boil. Add cauliflower and 1/2 tsp salt and cook until cauliflower is just fork tender. Do not over cook.
  • Drain cauliflower well and place back in pot. Set aside.
  • In a small sauce pan, bring cream to a simmer, stirring well to avoid scorching.
  • Whisk in cream cheese and mustard and stir until mixture thickens.
  • Remove from heat and whisk in 1 cup shredded cheese and seasonings.
  • Pour over cauliflower and gently mix to combine.
  • Place cauliflower in prepared dish. Sprinkle with remaining cheese and bake until cheese is bubbly and slightly browned, or about 15 minutes.
  • For an extra bubbly topping, broil on high for 2-3 minutes but be sure to watch carefully