In a medium-sized bowl, whisk together the flour, cocoa powder, baking powder and salt. Set aside.
In a large bowl mix butter with sugar until light, creamy and fluffy. Add eggs one at a time. Add vanilla extract and lemon juice and mix to combine. Incorporate red food coloring.
Gradually incorporate flour mixture. Fold in white chocolate chips/chunks. Cover the bowl with plastic wrap and refrigerate for at least 2 hours.
Preheat oven to 350F (180C). Line baking sheets with parchment paper. Place powdered sugar into a bowl.
Using your ice cream scoop take equal portions of dough, about 1 inch (2.5 cm) balls,and roll into the powdered sugar, coating thickly. Place on the prepared baking sheet. Repeat with remaining dough, keeping 2 inches (5cm) space between cookies.
Bake 10-12 minutes or until cookies are cracked. Cool on baking sheets for 5-10 minutes. Remove to cooling rack to cool completely.