These delightful cupcakes feature a rich, moist chocolate cake with a whole Oreo baked inside, topped with a fluffy, not-too-sweet cookies and cream frosting.
Ensure all frosting ingredients are at room temperature (except the cooked milk/flour mixture) for best results.
Do not overmix the cupcake batter once the flour is added; mix just until combined.
For even cupcakes, use an ice cream scoop to portion the batter into the liners.
Make sure the flour/milk mixture for the frosting is completely chilled before adding it to the butter and sugar.