Preheat your oven to 350°F (175°C). Grease your baking pan or line it with parchment paper for easy removal.
In a medium saucepan, melt the unsalted butter over low heat. Once melted, remove from heat and let it cool slightly.
In a large mixing bowl, whisk together the melted butter, maple syrup or brown sugar, dark chocolate chips (reserve some for later), eggs, and vanilla extract until well combined.
In another bowl, sift together the brown rice flour, cocoa powder, baking soda, and instant coffee or cinnamon.
Gradually add the dry mixture to the wet mixture, stirring until just combined. Be careful not to overmix; a few lumps are okay!
If desired, fold in the remaining chocolate chips for extra chocolatey goodness.
Pour the brownie batter into the prepared baking pan, spreading it evenly. Bake for 25-30 minutes or until a toothpick inserted into the center comes out with a few moist crumbs.
Allow the brownies to cool in the pan for about 10 minutes before transferring them to a wire rack to cool completely. Cut into squares and enjoy!