Basic Chocolate Sponge Cake l Best Sponge For Birthday Cake

#basic-chocolate-sponge INGREDIENTS: EGG 4 ROOM TEMP. SUGAR 1/2 CUP (100 GRAM) VANILLA ESSENCE 1 TSP FLOUR/AP FLOUR 2/3 CUP (80 GRAM) COCOA POWDER 1/4 CUP (20 GRAM) BAKING POWDER 1 TSP