Marbled Bundt Cake - cooking recipe

Ingredients

1 cup butter, softened
2 cups sugar
2 tablespoons sugar
4 large eggs, room temperature
2 cups sour cream
1 tablespoon vanilla
4 cups flour
2 teaspoons baking powder
2 teaspoons baking soda (use a semi-heaping teaspoon)
1 teaspoon salt
4 ounces bittersweet chocolate, melted
1 cup chocolate chips
1 cup white chocolate chips

Preparation

Set oven to 325 degrees.
Grease and flour a 12-cup bundt cake pan.
In a bowl beat butter with 2 cups plus 2 tbsps sugar together until fluffy (about 3 minutes).
Add in eggs and vanilla; beat until well combined (about 4 minutes).
Add in the sour cream; mix until combined.
In a bowl mix together flour, baking powder, baking soda and salt; add the creamed mixture; mix until just combined.
Remove 2 cups of the batter; stir in the melted bittersweet chocolate.
Add/stir in the dark chocolate chips into the white cake batter.
Add/stir the white chocolate chips into the dark batter.
Using heaping tablespoonfuls alternately dollup the different cake batters into the prepared bundt pan.
Run a knife through the cake only once, swirling the batter a little.
Bake for about 50-60 minutes, or until the cake tests done.
Cool cake in pan for about 15-20 minutes before removing to a rack.