Step 1

Preheat the oven to 350 degrees F (175 degrees C). Grease and flour an 8-inch round cake pan.

Step 2

Combine flour, sugar, cocoa powder, baking soda, and salt in a large bowl, whisking until smooth. Cut in buttery spread using a pastry cutter or 2 knives until it is the size of small peas and flour mixture is evenly coated.

Step 3

Pour soy milk, coffee, vinegar, and vanilla extract into the bowl. Blend with an electric mixer until smooth; beat for 2 minutes more. Pour batter into the prepared pan.

Step 4

Bake in the preheated oven until a toothpick inserted into the center comes out clean, 35 to 40 minutes. Cool in the pan for at least 10 minutes before inverting onto a wire rack or serving plate.