Diabetic Marble Pound Cake

Process sugar substitute in a blender, mini chop, or food processor to make powdered or confectioners' sugar.

Preheat the oven to 350 degrees F. Spray a 12-cup bundt cake pan with nonstick cooking spray.

In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. In another medium bowl, with an electric mixer at medium speed, beat the margarine until creamy, 2 minutes.

Gradually blend in the granulated sugar substitute, 1/2 cup at a time.

Add the egg substitute and milk, blending until smooth. Add the flour mixture to the margarine mixture in thirds, and blend until smooth, 2 minutes.

Put 1 cup of the batter in a small bowl and stir the cocoa into it until evenly colored; set aside.

Pour half of the remaining yellow batter in the prepared bundt pan. Spoon the chocolate mixture onto this layer without smoothing it out. Gently spread the rest of the yellow batter on top.

To marble, take a knife and cut through the entire batter, swerving the knife back and forth. Bake until golden brown and a toothpick inserted into the center of the cake comes out clean, 30-35 minutes.

Cool for 10 minutes, then unmold by sliding a thin knife around the cake, pressing against the pan. Invert onto a cake plate. Cool completely, then sprinkle with powdered sugar substitute.