-chocolate Butter 12 large muffin cups. Stir together flours, cocoa powder, sugars, baking powder, folgers. In another bowl, beat butter, half-n-half, sour cream, and eggs until smooth. Fold in dry ingredients, orange zest, and chcocolate into egg cream mixture. Mix lightly till just moistened. Fill prepared muffin cups 2/3 full. Bake at 350 degrees till tops are firm, about 15 minutes.