1 1/2 cups all-purpose flour |
1/3 cup unsweetened cocoa |
1/2 teaspoon baking soda |
1/4 teaspoon salt |
1 cup sugar |
3 tablespoons stick margarine, softened |
1 teaspoon instant espresso granules or 2 teaspoons instant coffee granules |
1 teaspoon vanilla extract |
1 (2 1/2-ounce) jar prune baby food |
1 large egg |
cooking spray |
1 (1-ounce) square semisweet chocolate, chopped |
1 (1-ounce) square white baking chocolate (such as baker's white baking chocolate), chopped |