Preheat oven to 350°F. Line baking sheets with parchment paper.

Whisk together flour and cocoa powder; set aside.

Cream butter, sugar, salt, baking powder, and baking soda until light and fluffy.

Add egg and vanilla; mix well.

Gradually add flour mixture on low speed until combined.

Drop dough by 1-tablespoon portions onto baking sheets, about an inch apart.

Make an indentation in each cookie using your thumb or teaspoon.

Place a cherry in each indent.

In a small saucepan, melt chocolate chips, condensed milk, and 2 teaspoons cherry juice over medium-low heat, stirring until smooth.

Fill each cherry indent with about 1 teaspoon of chocolate mixture, covering the cherry.

Bake for 9 minutes. Cool on sheet briefly, then transfer to rack to cool completely.