Tessellating Two-Color Brownies | Recipes | PBS Food

Tessellating Two-Color Brownies

Make brownies into math homework when we create these tessellating two-color brownies with your children. Aviva Goldfarb of The Six O'Clock Scramble shares this recipe. See the full post at Kitchen Explorers.


Prep time: 5 Minutes

Cook time: 12 Minutes

Total time: 17 Minutes

Yield: 48 brownies



  • 1/2 cup butter or margarine at room temperature plus extra for pan
  • 1/2 cup orange juice (secret ingredient!)
  • 1/3 cup unsweetened cocoa
  • 2 eggs
  • 1 ½ cups sugar
  • 1/4 teaspoon salt
  • 1 teaspoon vanilla
  • 1 cup flour plus extra for pan
  • 1 teaspoon baking powder
  • 1/4 cup powdered sugar


  1. Ask an adult to preheat the oven to 350° Fahrenheit.
  2. Place all the ingredients except the powdered sugar in a medium mixing bowl. Use a large, sturdy spoon (or an electric mixer if you like) to mix all the ingredients together thoroughly.
  3. Prepare the pan to prevent the Tessellating Brownies from sticking. Put some margarine or butter into the pan and spread it around using a paper towel. Dust a spoonful of flour on top of the margarine and tilt the pan back and forth so a thin layer of flour sticks to the margarine.
  4. Spoon the dough into the pan. Ask an adult to place the pan in the oven.
  5. Have an adult remove the brownies from the oven after about 12–15 minutes, when the edges are slightly browned. To test for doneness, poke a toothpick in the middle of the brownies and then pull it out. There should be no gooey dough sticking to it.
  6. Allow the brownies to cool in the pan for at least 15 minutes. Then turn the pan upside down on a cooling rack to remove the brownies.
  7. Use the knife to cut the large rectangle carefully in half to make two smaller rectangles. Sprinkle the powdered sugar onto one half of the brownies only.
  8. Cut the powdered portion into squares. Then carefully cut each square diagonally to form two triangles.
  9. Cut the unpowdered side of the brownies the same way: first squares, then triangles.
  10. Take one powdered triangle and one plain triangle and place them together to make a rectangle. Continue the tessellation by alternating one powdered triangle with one plain triangle. If you like, you can make a tessellating design like the fish.
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