Preheat your oven to 350°F (175°C). This is a crucial step that ensures an even bake.
Line a 9x9-inch baking pan with parchment paper, allowing some overhang for easy removal later. This will help you lift the brownies out easily.
In a medium saucepan, melt ½ cup of pure butter or coconut oil over low heat. Remove from heat and let it cool slightly.
In a large bowl, combine 1 cup of coconut sugar, ½ cup of cocoa powder, and ¼ teaspoon of kosher salt. Whisk them together until well mixed.
Pour the melted butter (or coconut oil) into the dry mixture. Add 1 ½ teaspoons of pure vanilla extract and two large eggs that have been lightly whipped. Stir until fully combined.
Gently fold in ½ cup of white whole-wheat flour and 1 cup of chocolate chips. If you’re using walnut pieces, fold them in at this stage too.
Pour the brownie batter into the prepared pan, spreading it evenly. Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted comes out with a few moist crumbs.
Allow the brownies to cool in the pan for about 10 minutes, then lift them out using the parchment paper and let them cool completely on a wire rack. Cut into squares and enjoy!