Seltzer Water Chocolate Brownies

FUDGY Seltzer Water Chocolate Brownies! Easy Homemade Double Chocolate Brownies recipe that uses seltzer water to make the brownies extra fluffy and moist! These gooey brownies are made from scratch and have a amazing chocolate frosting on top! My husband considers these the BEST brownies ever!

Course Dessert
Servings 12


  • 1 cup unsweetened cocoa powder
  • 1/2 teaspoon baking soda
  • 1/3 cup vegetable oil
  • 1/2 cup seltzer water flavored or plain I used Vintage Pineapple
  • 2 cups sugar
  • 2 eggs
  • 1/3 cup vegetable oil
  • 1 1/3 cup flour
  • 1 teaspoon vanilla extract
  • 1/4 teaspoon salt
  • 1 cup mini chocolate chips


  1. Preheat oven to 350 degrees. Prepare a 8x8 pan by spraying with nonstick spray.
  2. In a large bowl mix cocoa powder and baking soda. Add 1/3 cup vegetable oil and seltzer water, continue to mix. Add sugar, eggs, remaining 1/3 cup vegetable oil, flour, vanilla and salt. Mix with hand mixer until combined.
  3. Add mini chocolate chips and stir with a spoon.
  4. Pour and spread evenly into the 8x8 pan.
  5. Bake for 50 minutes. Allow to cool before cutting into 9 (big!) squares.
  6. Eat as is, or add frosting on top.