Preheat the oven to 350°F (175°C) and line an 8×8-inch baking pan with parchment paper.
Pierce the sweet potatoes with a fork and microwave or roast until soft (about 8–10 minutes). Peel and mash them until smooth.
In a large mixing bowl, combine the mashed sweet potatoes, almond flour, cocoa powder, maple syrup, melted coconut oil, vanilla extract, baking powder, and salt until a thick, uniform batter forms.
Fold in dark chocolate chips or brownie mix cookies pieces to add texture.
Pour the batter into the prepared baking pan and smooth the surface.
Bake 30–35 minutes, checking with a toothpick to ensure it comes out mostly clean but still slightly fudgy.
Remove from the oven and let the brownies cool completely before slicing. This ensures clean edges and perfect texture.
Optional: top with chocolate brownie frosting or sprinkle crushed Andes mint chocolate brownies for a mint chocolate brownie twist.
Slice into squares or cut into brownie bites for easy serving.