For the Cookies:
- 1 cup (226g) unsalted butter, softened
- 1/2 cup (100g) brown sugar
- 1 large egg yolk, room temperature
- 1 teaspoon vanilla extract
- 2 cups (250g) all-purpose flour
- 2 teaspoons unsweetened cocoa powder
- 4 teaspoons red food coloring
- 1/2 cup (100g) granulated sugar or sanding sugar (for rolling)
For the Cream Cheese Filling:
- 4 ounces (113g) cream cheese, softened
- 1 large egg yolk, room temperature
- 1/4 cup (50g) granulated sugar
- 1/8 teaspoon salt
- 1/4 teaspoon vanilla extract