Step 1

Preheat oven to 350º F (180º C). Line an 8-in (20 cm) round cake pan with parchment paper. Lightly grease with baking spray with flour.

Step 2

In a large bowl, mix cake mix, water, oil, yogurt, and flour, if using, until everything is well combined. Do not overmix the batter.

Step 3

Pour batter into prepared pan.

Step 4

Bake, as directed on the box, or until a toothpick inserted in the center, comes out clean. Cool for 10 minutes before unmolding. Cool completely before frosting.