Preheat oven to 350 degrees. Grease an 8x8 inch baking pan.
Whisk flour, cocoa powder, salt, and baking powder together in a large bowl.1 1/2 cups freshly milled spelt flour,3/4 cup unsweetened cocoa powder,1/2 teaspoon salt,3/4 teaspoon baking powder.
Whisk butter, sugar, eggs, and vanilla together in a separate bowl until smooth.3/4 cup butter,1 1/2 cups granulated white sugar,3 eggs,1 1/2 teaspoons vanilla extract.
Pour wet ingredients into dry and stir until just combined. Fold in chocolate chips.1 1/4 cups chocolate chips
Pour batter into prepared pan and spread evenly.
Bake 25 to 28 minutes until a toothpick inserted in the center comes out with just a few moist crumbs.
Cool completely before cutting. Store in an airtight container at room temperature up to 4 days.
Notes
Tip: Don't overbake. Pull the brownies from the oven when a toothpick comes out with a few moist crumbs for the fudgiest texture.