Fudgy Oat Brownies Recipe
Fudgy Oat Brownies Recipe photo by Taste of Home

Fudgy Oat Brownies Recipe

Publisher Photo
These cake-like brownies have a rich crunchy oat crust and a smooth homemade chocolate frosting. A packaged brownie mix makes the recipe easy to prepare. You can make it even easier by using canned frosting.
TOTAL TIME: Prep: 30 min. Bake: 35 min. + cooling
MAKES:36 servings
TOTAL TIME: Prep: 30 min. Bake: 35 min. + cooling
MAKES: 36 servings


  • 1-1/2 cups quick-cooking oats
  • 3/4 cup all-purpose flour
  • 3/4 cup packed brown sugar
  • 1/4 teaspoon baking soda
  • 1/4 teaspoon salt
  • 3/4 cup butter, melted
  • 1 package fudge brownie mix (13-inch x 9-inch pan size)
  • 3 tablespoons butter
  • 1-1/2 ounces unsweetened chocolate
  • 2-1/4 cups confectioners' sugar
  • 3 to 4 tablespoons hot water
  • 1-1/2 teaspoons vanilla extract


  1. In a large bowl, combine the oats, flour, brown sugar, baking soda and salt. Stir in butter until combined. Press into an ungreased 13-in. x 9-in. baking pan. Bake at 350° for 10-11 minutes or until puffed and edges are lightly browned.
  2. Meanwhile, prepare brownie mix according to package directions for cake-like brownies. Spread batter over crust. Bake 25-30 minutes longer or until a toothpick inserted near the center comes out clean.
  3. For frosting, in a microwave-safe bowl, melt butter and chocolate; stir until smooth. Immediately stir in the confectioners' sugar, 2 tablespoons water and vanilla until smooth. Add remaining water; stir until smooth. Immediately spread over brownies. Cool on a wire rack until firm. Cut into bars. Yield: 3 dozen.
Originally published as Fudgy Oat Brownies in Taste of Home April/May 2005, p31

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Reviewed Aug. 16, 2014

Used the Five Star Brownie recipe here instead of a mix. AWESOME!!

Reviewed Jul. 8, 2014

These were so indulgent. I added chocolate chips to the brownie batter and frosted with peanut butter frosting. They looked very pretty and tasted even better. Great way to jazz up a boxed brownie mix. A winner!

Reviewed Jun. 29, 2014

I recall preparing these brownies when they appeared in the 2005 Brownie Contest for Taste of Home! I'd greased and floured my baking pan (13x9x2") and I'd used 3-1/4 cups of confectioners' sugar! I plan to use this recipe again! It's a great recipe to use and for me, it's a keeper! delowenstein

Reviewed Feb. 21, 2012

Everyone LOVES these brownies. They disappear in a flash!

Reviewed Aug. 22, 2011

This is my all time favorite brownie recipe! I make them a lot for our youth group or church events and I never come home with left overs!

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