Step 1: Preheat your oven to 350°F (175°C).
Step 2: Line a 9x13 inch baking pan with parchment paper.
Step 3: In a medium saucepan, melt the butter and unsweetened chocolate over low heat.
Step 4: In a mixing bowl, whisk together gluten-free flour, coarse kosher salt, and baking powder.
Step 5: Combine the melted chocolate mixture with granulated sugar, then add eggs and vanilla extract.
Step 6: Gradually add the dry ingredients to the wet ingredients, folding gently.
Step 7: Fold in the semisweet chocolate chips.
Step 8: Pour the batter into the prepared pan and bake for 25-30 minutes.
Step 9: Allow the brownies to cool before cutting into squares.
