Step 1: Preheat and Prepare - Begin by preheating your oven to 350°F (175°C). Grease your 8x8 inch baking pan or line it with parchment paper for easy removal of the brownies.
Step 2: Melt the Chocolate - In a microwave-safe bowl, combine 4 ounces of dark chocolate with the coconut oil. Microwave in 20-second intervals, stirring in between, until completely melted and smooth. Set aside to cool slightly.
Step 3: Combine Wet Ingredients - In a mixing bowl, whisk together the nonfat vanilla Greek yogurt, coconut sugar, and eggs until well combined. Then, pour in the melted chocolate mixture, stirring until everything is nicely blended.
Step 4: Mix Dry Ingredients - In another bowl, sift together the cocoa powder, cornstarch, baking soda, and salt. This step ensures there are no lumps and that your brownies will have a uniform texture.
Step 5: Combine Wet and Dry Ingredients - Gradually add the dry ingredients to the wet mixture, stirring gently until just combined. Be careful not to overmix, as this can result in denser brownies.
Step 6: Fold in Chocolate Chunks - Chop the remaining 1 ounce of dark chocolate into small chunks. Gently fold these chocolate pieces into the brownie batter for extra chocolatey goodness.
Step 7: Bake - Pour the batter into the prepared baking pan and spread it evenly. Bake in the preheated oven for 20-25 minutes. You’ll know they’re ready when a toothpick inserted into the center comes out with a few moist crumbs but not wet batter.
Step 8: Cool and Cut - Once baked, remove the brownies from the oven and let them cool in the pan for about 10 minutes. Then, transfer them to a wire rack to cool completely before cutting into squares. Enjoy your Healthy Greek Yogurt Brownies!