Peanut Butter-Oatmeal Brownies With Peanut Butter Frosting

READY IN: 37mins
Recipe by Kittencalrecipezazz

The trick with these is not to overbake, throw in some chocolate or peanut butter baking chips if desired :) You could mix this by hand, but there is a lot of dough and it is quite thick so I recommend using a stand mixer to mix the batter, if you prefer a really sweet bar then increase the brown sugar to 1-1/4 cups.

Top Review by bricookie55

These are delicious! I'm only reviewing the brownie, not the frosting, as I left it out this time. I chose to use vanilla extract, self-rising flour (and left out the baking soda), and since I had no peanuts on hand, I threw in a half cup of bittersweet chocolate chips. So absolutely yummy! I don't think it needs frosting, personally, but I'm sure it's great with that too. This definitely cured my peanut butter cravings. Thanks for another winner Kitten!

Ingredients Nutrition


  1. Set oven to 350 degrees.
  2. Set oven rack to second-lowest position.
  3. Grease a 13 x 9-inch baking pan.
  4. In a large bowl using an electric mixer cream the butter or margarine with white and brown sugar until well creamed.
  5. Mix in the peanut butter.
  6. Add in eggs and maple or vanilla extract; mix until well blended (about 3 minutes).
  7. In a bowl combine the flour with oats, baking soda and cinnamon; add to the creamed mixture and mix until well combined.
  8. Mix in chopped peanuts.
  9. Transfer to baking dish, then spread out evenly (the mixture will be quite thick so use you hands to spread in the dish).
  10. Bake for about 20-22 minutes.
  11. Cool completely before frosting.
  12. For the frosting; in a bowl beat butter or margarine and peanut butter until fluffy using an electric mixer.
  13. Gradually mix in confectioners sugar, when the mixture stars to get thick add in the milk or cream a tablespoon at a time until a desired spreadable consistency is achieved.
  14. Spread over the cooled brownies.
  15. Cut into bars.

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