For the Cupcakes:

1. 1. Preheat your oven to 350°F (175°C). Line a cupcake pan with paper liners.
2. 2. In a large bowl, whisk together flour, cocoa powder, baking powder, and salt.
3. 3. In another bowl, mix sugar, eggs, milk, vegetable oil, and vanilla extract until smooth.
4. 4. Gradually add the wet mixture to the dry ingredients. Stir gently until just combined.
5. 5. Pour the batter into cupcake liners about two-thirds full. Bake for 18–20 minutes or until a toothpick comes out clean.

For the Frosting:

1. 6. While cupcakes cool, beat softened butter with powdered sugar until fluffy.
2. 7. Gradually add heavy cream until you achieve your desired consistency. Fold in crushed cookies.
3. 8. Once cupcakes have cooled completely, generously frost each one with cookie-studded frosting.