1/2 cup flour
1/4 cup cocoa powder
1 teaspoon baking powder
1/4 teaspoon salt
4 eggs, at room temperature
3/4 cup sugar
2 teaspoons vanilla extract
whipped cream

Mix eggs, sugar and vanilla extract. Beat at high speed until thick and light; approximately 10 minutes. Fold in dry ingredients. Bake in a 15 x 10 inch jelly roll pan lined with wax paper and greased at 350°F for 20-25 minutes. Remove.

Peel off wax paper - trim edges and cool 5 minutes. Roll up cake in towel for at least 1 hour. Unroll and spread with whipped cream. Roll up again.

Place on serving dish. Frost with chocolate frosting. Run tines of fork length of log for bark effect. Cut in crosswise slices.