Rainbow Bundt
using Natural Dyes
3 cups all-purpose flour
1 tsp baking powder
½ tsp baking soda
½ tsp salt
1 cup unsalted butter, softened
2 cups granulated sugar
4 large eggs
1 tsp vanilla extract
1 cup buttermilk
zest of 2 lemons
2 tbsp fresh lemon juice
2 tsp Purple Sweet Potato Powder
2 tsp Butterfly Pea Powder
2 tsp Beetroot Powder
1 tsp Cranberry Juice Powder
powdered sugar for dusting (optional)
  • Preheat your oven to 350°F (175°C). Grease and flour a 10-inch Bundt pan.

  • In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.

  • In a large mixing bowl, cream together the butter and sugar until light and fluffy.

  • Beat in the eggs, one at a time, then stir in the vanilla extract.

  • Gradually add the dry ingredients to the wet ingredients, alternating with the buttermilk, beginning and ending with the dry ingredients. Mix until just combined.

  • Stir in the lemon zest and lemon juice until well incorporated.

  • Divide the batter into 4 small bowls. Add the beetroot and cranberry powders into the same bowl, the butterfly pea into its own and the purple sweet potato into its own as well. The last bowl of batter will be left as is. Mix the powders into each bowl until the dyes are well incorporated.

  • Alternate pouring in the colored batters into the prepared Bundt pan and use a knife or cooking skewer to zig-zag through the batter to create a marble effect.

  • Smooth the top with a spatula.

  • Bake in the preheated oven for 45-55 minutes, or until a toothpick inserted into the center comes out clean.

  • Allow the cake to cool in the pan for 10 minutes, then invert it onto a wire rack to cool completely.

  • Once the cake has cooled, dust with powdered sugar.

  • Slice, serve, and enjoy your delicious Rainbow Bundt cake!
    If you don't have buttermilk on hand, you can easily make a substitute using milk and lemon juice or vinegar:
  • Measure out 1 cup of milk (whole milk or 2% milk works best).

  • Stir in 1 tablespoon of lemon juice or white vinegar.

  • Let the mixture sit for about 5-10 minutes to allow it to curdle and thicken slightly.

  • After it has thickened slightly and looks somewhat curdled, it's ready to use as a substitute for buttermilk in your recipe.
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