Overnight Steel Cut Oats Breakfast Jars

head on view of 4 steel cut breakfast jars with flavorful toppings.

5 from 1 reviews

Overnight Steel Cut Oats Breakfast Jars make a delicious porridge for on-the-go or simply to have ready at home when the mood strikes!


  • 2 cups steel cut oats (or 1 cup steel cut oats + 1 cup raw buckwheat groats)
  • 5 cups water
  • 1 teaspoon cinnamon, optional
  • 1/2 teaspoon cardamom, optional
  • 1 teaspoon vanilla extract, optional
  • pinch of himilayan salt

Optional ideas for topping:

  • 12 tablespoons chopped dates, raisins, apricots or other dried fruit
  • 1 tablespoon unsweetened coconut flakes
  • 1/4 cup fresh berries of all kind
  • 1/41/3 cup coconut, almond, cashew, oat or any non-dairy milk
  • 12 tablespoons pure maple syrup, coconut sugar or other sweetener of choice
  • 12 tablespoon nuts and seeds of all kinds
  • sprinkle of cocoa nibs
  • 12 tablespoons 100% fruit chia jam
  • 12 tablespoons almond butter or nut butter of choice


Simmer: In a dutch oven or large pot, steel cut oats, spices, salt, and water, bring to a boil, cover, reduce heat to low, and simmer for 5 minutes. Remove from heat, give a good stir, add more water as needed.

Rest overnight: Let cool, fill individual mason jars (or other containers), cover, and let sit overnight in the fridge. Alternatively, keep it in the pot you cooked it in, cover, and keep in the fridge overnight.

Fill jars: The next day fill your jars with a mix of toppings for grab & go time or simply top each jar when ready to eat.

I prefer to eat my breakfast jars at room temp but you can heat yours either in the microwave for a minute or two, or use a heated pot of water setting the mason jar in the center until warmed.

This will fill 4 – 6 pint-sized mason jars with plenty of toppings. Wide mouths are preferred as it’s much easier to spoon out of for eating.

Serves 4 – 6

Store: Keep breakfast jars in the refrigerator for up to 5 days.


I like my porridge on the thicker side, adjust water adding more for a thinner consistency. I prefer to add the non-dairy milk at serving to thin it out a bit.

Adjust the amount of cinnamon and cardamom to suit your taste. I’m in love with cardamom at the moment and find myself using a bit more than suggested here.

Nutrition is calculated for the oatmeal only, no topping included.