Mix the molasses and brown sugar into the bowl with brown butter.
Whisk in the egg and vanilla until well combined.
Add in the flour, baking powder, baking soda, salt, and gingerbread spice. Use a rubber spatula to fold the mixture together just until a few flour streaks remain.
Add in the chocolate and fold the mixture together just until no flour streaks remain.
Scoop out 3 tbsp. portions of the gingerbread cookie dough. Then, remove the brownie dough from the freezer and scoop out 2 tbsp. portions of that dough.*
Use a knife or your hands to split each ball of cookie dough in half.
Alternate adding each half ball of flavor to your hand, for a total of four pieces of dough (for example – brownie: gingerbread: brownie: gingerbread)
Roll the dough into a ball, and repeat with the remaining cookie dough. (Tip: for uniform balls of dough, you can gently press each cookie dough ball into a 3 tbsp. cookie scoop!)
Place the dough balls into an airtight container in the fridge for 30 minutes**
Preheat the oven to 350°F / 175°C.
Evenly space out the cookie dough balls on a parchment lined cookie sheet and top them with extra chocolate.
Bake for 12-14 minutes, or until the edges of the cookies start to turn golden brown.
Once the cookies come out of the oven, I recommend "scooting" them. This just means take a bowl, cup, or biscuit cutter that is slightly larger than the cookie, place it on top of the cookie, and swirl the bowl around to make the cookie a little more round.
Let the cookies sit on the hot baking tray for at least 5 minutes before transferring them to a wire rack to cool. If desired, press a little gingerbread cookie into the tops of the cookies.