• Using a stand mixer or hand mixer, beat the butter, eggs, sugar, and vanilla together. Next, add the flour and baking powder until well-combined.
  
• Preheat oven to 350°F. Line a baking sheet with parchment paper. Next, form small, round balls out of the dough (about the size of a walnut).
  
• Arrange the dough balls on the baking sheet about an inch apart. Bake for about 15-20 minutes (you'll want to pull them out of the oven while they're still white, not golden brown).
  
• Using a knife, cut out a small hole in the center of each cookie.
  

Filling

• To make the filling, combine the dulce de leche with the cookie crumbs and crushed walnuts.
  
• Fill in each hole with the dulce de leche filling. Press two cookies together to form a peach shape.
  

Decorating

• Fill two medium-sized bowls with a cup of milk. Dye one bowl of milk pink using pink food coloring. In the other bowl, combine pink food coloring and green food coloring to create a peach color.
  
• Dip one side of the cookie into the pink milk and the other side into the peach milk. Dunk the cookie into a bowl full of sugar and place it on a baking sheet lined with parchment paper. Repeat until you have no more cookies left. Allow the cookies to set at room temperature overnight.
  
• Decorate the cookies with small leaves. Serve and enjoy!