I'm not sure...is black bottom one word? Should I have ran that together? When I'm tired, questions like these haunt me.
One thing's for sure...hula girl thought they were hula-licious! (I know, I'm sorry...it's the fatigue.)
Found the recipe at Joy of Baking. It's pretty simple really. Although in her picture she gets the cream cheese filling deeper into the center than I did. I imagine it still tastes the same.

Here's how to make 'em:
Cream Cheese Filling:
8 ounces cream cheese, room temperature
1/3 cup sugar
1 large egg
1/2 teaspoon pure vanilla extract
Chocolate Cupcakes:
1 1/2 cups all purpose flour
1 cup brown sugar
1/3 cup natural unsweetened cocoa powder (not Dutch processed)
1 teaspoon baking soda
1/4 teaspoon salt
1/3 cup unflavored vegetable oil
1 tablespoon white vinegar
1 teaspoon vanilla
Preheat oven to 350. Line a muffin pan or spray with non stick spray for 12 cupcakes.
Beat the cream cheese until smooth. Add the sugar, egg, and vanilla extract and beat until creamy and smooth. Set aside.
In a large bowl sift together the flour, sugar, cocoa powder, baking soda, and salt. In a separate bowl mix the water, oil, vinegar, and vanilla extract. Make a well in the center of the dry ingredients and stir in the wet ingredients until nice and smooth. Evenly divide the batter among the 12 muffin cups. Then spoon a few tablespoons of the cream cheese filling into the center of each cupcake. Bake about 25 minutes.