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Rainbow Brownies

Yammies Noshery Recipe by
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Rainbow Brownies
  • Prep Time 20 min
  • Total Time 30 min
  • Servings 9
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Rainbow Brownies

Do you believe in rainbows? Then you'll believe in these brownies too. Full of color and sunshine and happiness!


box Betty Crocker™ Ultimate Fudge brownie mix , baked in an 8x8 pan
cup butter, softened
cup heavy cream
cups powdered sugar
OR replace butter, cream, sugar with 1 tub of Betty Crocker™ Rich & Creamy vanilla frosting
Food coloring gel


  • 1 Bake and cool brownies as directed for an 8x8 pan.
  • 2 Alternately add the cream and powdered sugar to the butter and beat until smooth. If it is too thick, add more cream; if it is too thin add more sugar.
  • 3 Divide the frosting equally into a cup for each color.
  • 4 Add a few drops of food coloring at a time to each cup until desired shade is reached.
  • 5 Transfer each color of frosting to separate plastic bags. Snip off a corner of the first bag and pipe stripes onto the brownies. Repeat with other colors.
  • 6 Use a pastry scraper or flat spatula to smooth out the frosting. Be very careful not to do this too much or colors will blend. Wipe the scraper after every swipe. You might want to touch it up a little at the end, piping any frosting in where there are patches, and carefully smoothing them over.
See Step By Step


Rainbow Brownies

As prepared by Yammies Noshery,

Rainbows are forever. But not on these beautiful brownies. Make them and see how fast they disappear!

Nobody’s too old for a good old-fashioned rainbow. You might outgrow your old princess dresses and Lisa Frank may have lost her charm, but rainbows are forever.

These brownies are super easy and quick to make, but they are totally impressive and such a feast for the eyeballs. Use a Betty Crocker brownie mix to get a jump start so you can get on to the fun part -- the frosting, which really is the star of this show.

You could make your own frosting, or you can zip through that part by just using a tub of Betty Crocker vanilla frosting -- and start coloring away!

Use gel food coloring to get more vibrant colors. I always divide the frosting into paper cups  for each color. Just use a couple drops of food coloring at a time and stir until the desired shade is reached.


Bags of colorful rainbow frosting.

Plop each color in separate plastic Ziploc bags.


Unsmoothed rainbow frosting.

Snip the tip off of each bag and pipe stripes of frosting onto your brownies.


Use a flat spatula or scraper to smooth rainbow frosting.

Now, since that looks kind of like a family of psychedelic worms, we need too smooth it out. Use a pastry scraper or flat spatula to carefully flatten the colorful worms.


Finished rainbow brownies.

And there you have it. Beauty.


Brownies with rainbow frosting.

Come on. Doesn't that just bring back the best of everything?

See Recipe

Expert Tips

Time does not include baking the brownies.

Nutrition Information 

No nutrition information available for this recipe
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