Pre-heat oven to 350*F.
In a medium bowl, mix together your almond flour, cocoa powder, arrowroot starch, espresso powder, xanthan gum, baking powder and salt. Set aside.
In another larger bowl, whisk together your melted butter, eggs, vanilla extract and sweeteners until smooth. Set aside.
In a large microwavable bowl, melt your chocolate-chips and 1/2 tbsp butter in 30s increments, stirring each time until completely melted and smooth.
Pour your dry ingredients into the butter and egg mixture and stir until partially combined.
Add your melted chocolate and stir again until everything is combined and the batter becomes thick.
Stir in an extra 1/4 cup of chocolate chips (optional).
Line an 8x8 inch pan with parchment paper and press your mixture evenly into the pan using a spatula or your hands to help.
Bake for 16-20min. The brownies will still be soft but will have risen slightly. Don't over-bake!
Let the brownies cool completely before lifting them from the pan. Slice into squares and serve! Enjoy The Best Low Carb Keto Brownies! (*Pro tip: these are great with a scoop of low carb ice cream or homemade sugar free whipped cream!)