Go Back
+ servings
Rainbow Cupcakes

Rainbow Cupcakes baked in a Mason Jars

Make Mason Jar Rainbow Cupcakes that look like a rainbow in a jar. Our rainbow cupcake recipe show steps on how to make rainbow cake or mini mason jar cake.
Course Dessert
Cuisine American, Irish
Keyword How to Make Rainbow Cake, Mason Jar Cupcakes, Rainbow Cupcake recipe, Rainbow Cupcakes, Rainbow in a Jar
Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings 8
Calories 240kcal
Author Evelyn


  • Spray the inside of the jars with a nonstick baking spray and preheat the oven to 350 degrees.
  • Prepare the cake mix according to package directions.
  • Divide the batter evenly into 5 separate bowls. (about 1/2 cup of batter in each bowl).
  • Add different food colors to each of the bowls and mix well to achieve bright bold colors.
  • Carefully drop blobs of the different colored batter into your prepared jars filling about halfway.
  • Place jars in a 9 X 13 pan and fill with about 1/4 to 1/2 inch of water.
  • Bake for 45-50 minutes until done. You can test for doneness by using a Cake Tester
  • Remove from the oven and water bath and let cool.
  • Once the cupcakes are cool, frost the tops and decorate with St. Paddy’s Day Cupcake Toppers and/or green sprinkles


Calories: 240kcal | Carbohydrates: 53g | Protein: 3g | Fat: 2g | Saturated Fat: 1g | Sodium: 448mg | Potassium: 40mg | Fiber: 1g | Sugar: 27g | Calcium: 142mg | Iron: 1mg