Directions

1. Make the cookies: Heat oven to 350F. Line 2 baking sheets with parchment. Whisk together the flour, cocoa, baking powder, and salt in a bowl.
2. Combine the chopped chocolate and butter in a microwave-safe bowl. Microwave on high in 30-second intervals, whisking in between, until melted and smooth. Let cool slightly. Whisk in the sugar, eggs, milk, ginger, and vanilla extract until smooth. Add the flour mixture; stir until just combined. Fold in the chocolate chips.
3. Shape the dough into balls (about 1 tbsp each) and place 1 inch apart on the baking sheet. Bake, rotating the sheets halfway through, until golden brown around the edges, 8-10 minutes. Let cool slightly on baking sheets then transfer to a wire rack to cool completely.
4. Make the filling and assemble the sandwiches: Bring the cream to a boil in a small pot. Remove from heat, add the chocolate and let sit for 5 minutes. Whisk to combine, let cool slightly. Form sandwiches with the cookies and about 1 tsp filling each.