For the cookie dough:

226 g softened butter
150 g sugar
150 g brown sugar
4 tablespoons (60 ml) milk
1 tablespoon vanilla
312.5 g all purpose flour
1/4 tsp. salt
1 cup mini chocolate chips

For the cupcakes:

340 g softened butter
300 g cups light brown sugar
4 large eggs
325 g all purpose flour
1 tsp. baking powder
1 tsp. baking soda
1/4 tsp. salt
235 ml milk
2 tsp. vanilla extract

For the frosting:

340 g softened butter
150 g light brown sugar
437 powdered sugar
1/2 tsp. salt
2 tablespoons milk
1 tsp. vanilla extract