Step 1

Preheat the oven to 350 degrees. Grease and flour an 8-inch cake pan. Set aside.

Step 2

In a large bowl, sift together the flour, sugar, cocoa, baking soda, and salt. Add the vanilla, vinegar, melted butter, and warm water; stir until just combined.

Step 3

Pour batter into prepared cake pan. Bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.

Step 4

Let cool before turning out of the cake pan. Cool completely before frosting, or dust with powdered sugar before serving.