IMPORTANT: This dough must be chilled to prevent the cookies from spreading!
Beat sugar, milk, butter, egg yolk + vanilla
Add in flour and cocoa until combined.
Chill the dough for 1 hour.
When ready to bake, roll balls in 1/2 tablespoon increments.
Make indent in center of cookies using your thumb or the back of a teaspoon
Bake on a parchment lined baking sheet at 350 for 10-12 minutes. We put 12 cookies on a standard sheet but they don't spread very much
As soon as cookies come from oven, re-press the center of the cookies to make an indent as they will have risen. Fill the indention with caramel and return to the oven for 1-2 minutes until the caramel spreads and is smooth in the center
Optional: When cooled - drizzle with red and green chocolate