Mix the cocoa with creamed shortening. Beat the eggs until thick and add the sugar gradually, then add the chocolate mixture. Add the vanilla and cottage cheese and beat for 1 minute. Sift the dry ingredients and blend into this mixture. Bake in a buttered 8-inch square pan in a 350 degrees F oven for 40 minutes. Cool and frost with Fluffy Chocolate frosting, or serve warm with lightly whipped cream.