Go Back
+ servings
oat flour mug cake in a pink mug with whipped cream and sprinkles
Print Recipe
4.60 from 5 votes

Oat Flour Mug Cake

Looking for something sweet and healthy? Look no further than this oat flour mug cake! This personal-sized cake is light and fluffy and made with wholesome ingredients. Go ahead and indulge your sweet tooth!
Prep Time4 minutes
Cook Time1 minute
Total Time5 minutes
Course: Dessert
Cuisine: American
Keyword: mug cake, Oat flour
Servings: 1 person
Calories: 357kcal
Author: Crystal Yentzen

Ingredients

  • cup oat flour*
  • 1 tablespoon cornstarch
  • 1 and ½ tablespoons coconut sugar or brown sugar
  • ¼ teaspoon baking powder
  • pinch salt
  • 1 tablespoon grass-fed butter melted, or olive or canola oil
  • ¼ teaspoon vanilla extract
  • 2 tablespoons sparkling water* or regular tap water, see notes

Instructions

  • Mix the oat flour, cornstarch, coconut sugar, baking powder, and salt in a small microwave-safe mug or ramekin.
  • Add in the melted butter, vanilla extract, and water. Mix together with a spoon until everything is well incorporated.
  • Microwave on high for 50-60 seconds. Mine is perfect at 55 seconds.
  • Allow to cool and top it with your favorite toppings, such as whipped cream or nut butter.
  • Enjoy!

Notes

  1. Oat Flour  Oat flour is sold in stores, but it’s also super easy to make at home. Simply blend old-fashioned oats in a high-speed blender until the oats become a fine powder (about 30 seconds to a minute). Store your oat flour in an air-tight container for up to three months. 
  2. Sparkling Water- I tested the mug cake using sparkling water and regular water, and I found that using sparkling water created a lighter, fluffier cake. But feel free to use regular water if that's what you have. 

Nutrition

Calories: 357kcal | Carbohydrates: 51g | Protein: 6g | Fat: 15g | Saturated Fat: 8g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 4g | Trans Fat: 0.5g | Cholesterol: 30mg | Sodium: 138mg | Potassium: 254mg | Fiber: 3g | Sugar: 13g | Vitamin A: 350IU | Calcium: 70mg | Iron: 2mg