Cauliflower Casserole in Instant pot (Video recipe)

Cauliflower casserole made in instant pot.

It is a comfort food with buttery cauliflower and creamy white sauce – An easy recipe for those busy days. This veggie casserole is a nice addition to your holiday menu, potluck or family Sunday dinner. A no oven cheat recipe

cauliflower casserole in instant pot

When you want something warm n cozy just for you and your partner on a cold winter night after a long day at work the last thing you want to do is fuss around in the kitchen right!! This is the recipe for such days. My only request is don’t burn at the bottom of the pan and blame me. : )

Cauliflower casserole in instant pot

Not a fan an of cauliflower ?

Oh come on..! How about carrot, parsnip, Brussels sprouts or broccoli. You can easily adapt the recipe and try with other veggies too!

What to do if the cauliflower casserole made in instant pot becomes over cooked ?

Don’t fret ! Serve it as cauliflower mashed!! If the cauliflower has become a total mush and florets cannot be rescued then let us turn to plan b 🙂 add a little stock or more milk use a hand blender to break it completely boil for two minutes and serve it as a cauliflower soup by sprinkling chopped fresh green herbs.

What to do if the cauliflower casserole has a lot of liquid than you need?

The cauliflower may have left more moisture from not draining well after washing. In such cases scoop out the veggie into the serving dish (so it wont be a mush) first then switch on the instant pot and press SAUTE mode LESS option. Thicken the sauce by stirring continuously it for few minutes then pour on top of the veggie and continue with topping from there. We are looking for a thick yet pouring consistency here. Remember the cauliflower casserole will thicken a bit as it sits.

Here is a detailed step by step video of the cauliflower casserole in instant pot.

Cauliflower casserole

Course Main Course, Side Dish
Cuisine American
Prep Time 10 minutes
Cook Time 15 minutes
Resting time 20 minutes
Servings 3
Author Meena


  • Instant pot


  • Cauliflower – 1 medium heat (Cut into florets and washed well)
  • Butter 1 tbsp
  • Garlic 2 cloves (chopped)
  • Red onion – 1 (chopped)
  • All purpose flour 1 1/2 tbsp
  • Milk – 1 cup + add little extra (as some all purpose flours absorb more liquid)
  • Red chili flakes – 1/2 tsp
  • Salt and pepper to taste
  • Bell pepper – 1/2 cup chopped
  • Sharp cheddar cheese – 1/2 cup
  • Crispy fried onion – 1- 2 handful (Store bought) Plain or flavored as per choice


  • In the Instant pot –> PRESS SAUTE MODE –> PRESS ADJUST button and set on LESS heat.
    Add the butter and allow it to melt. Add the chopped garlic saute until the raw smell goes.
  • Add the chopped onion and saute until it becomes slightly brown. Cover and cook for two minutes. Stir in between to avoid burning.
  • Add all purpose flour and stir until the flour gives a fried aroma. Add milk 1/2 cup first then another 1/2 stir well until there are no lumps. ( see notes)
  • Add red chili flakes, salt and pepper to taste. Stir well to a smooth consistency.
  • Add half the grated sharp cheddar cheese. Stir well.
  • Add cauliflower florets mix well.
  • After Instant pot finishes the 4 minutes –> IMMEDIATELY press CANCEL (SWITCH OFF)
    OPEN the lid after 15- max 20 minutes . (Natural pressure release)
    ***DO NOT PUT LOW SETTINGS (after 4 minutes cook time) IT WILL BURN AS THERE IS NO WATER INSIDE.***
  • Gently stir ones and scoop the contents into a serving dish.
  • Sprinkle the remaining cheese on top and generously top it off with crispy fried onion
  • Serve the cauliflower casserole warm with more fried onion as desired



Do not leave the dish unattended in instant pot on  low settings after cooking time (4 minutes) . 
*To be on the safer side:  Add more milk if you think it will scorch at the bottom in the initial stage itself as some flours may absorb more liquid.* 
Reduce cooking time to 1-2 minutes if you like to add a bite to the cauliflower. 
Make sure to work in LESS option in SAUTE mode so nothing burns.
The cauliflower casserole tastes best as soon as it is made but stays good in the refrigerator for  1 to 2 days. Store before adding toppings. Reheat the dish well and then add toppings so cheese will melt and the onion is added just before serving so it will be crisp.

Other variations for topping after opening the cauliflower casserole in instant pot are adding Parmesan cheese, butter sauteed bread crumbs or fried bacon.

Note :

Instant pot I use is the oldest model of this one – (details here) 

I have used a 6 quart Duo. This allows enough space inside and the milk does not spill or overflow through the venting nozzle while cooking.

Insert pan and stand I use – (details here)

Other tried and tested cauliflower recipes you would like to try :

Cauliflower bread sticks

Cauliflower 65

Cauliflower patties

Cauliflower stir fry with peas

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