Prep: Preheat oven to 350 F. Line an 8 by 8-inch baking pan with parchment paper.
Make the batter: Combine the carrots and wet ingredients together in a large bowl. Stir until fully incorporated and no traces of egg or sourdough discard remain.
226 grams carrots, 113 grams unsalted butter, 226 grams organic cane sugar, 113 grams sourdough discard, 2 eggs, 56 grams heavy cream
Whisk the dry ingredients together.
155 grams all-purpose flour, 30 grams rye flour, ¾ teaspoon baking powder, 1 teaspoon cinnamon, ¼ teaspoon cloves, 1 teaspoon salt
Fold the flour mixture into the wet ingredients a third at a time, waiting until no traces of dry flour remain before waiting to add the next addition. This will prevent clumps and excess gluten from forming.
Pour the batter into the prepared pan.
Bake: Bake the cake for 40 to 45 minutes or until the top of the cake looks completely set and a toothpick inserted in the center comes out clean.
Transfer the cake to a wire rack and it cool completely.