Ingredients

2 cups all-purpose flour1-3/4 cups sugar1 teaspoon baking soda1 can (12 ounces) cola1/2 cup butter, cubed1/2 cup canola oil1/4 cup baking cocoa1-1/2 cups miniature marshmallows2 large eggs, room temperature1/2 cup buttermilk1 teaspoon vanilla extractTOPPING:2 cups sour cream1/2 cup packed brown sugar1/2 teaspoon vanilla extract3 cups sliced fresh strawberries

Preparation

Preheat oven to 350°. Grease a 13x9-in. baking pan. In a large bowl, whisk flour, sugar and baking soda. In a large saucepan, bring cola to a boil; cook until liquid is reduced to 1 cup, 7-9 minutes. Stir in butter, oil and cocoa; return to a boil, stirring occasionally. Remove from heat; stir in marshmallows until melted. Add to flour mixture, stirring just until moistened.

In a small bowl, whisk eggs, buttermilk and vanilla until blended; add to flour mixture, whisking constantly. Transfer to prepared pan. Bake until a toothpick inserted in center comes out clean, 30-35 minutes. Cool completely in baking pan on a wire rack.

For topping, in a small bowl, mix sour cream, brown sugar and vanilla until smooth. Serve cake with topping and strawberries.