1. 1. Preheat your oven to 350°F. Grease or line an 8×8-inch baking pan with parchment paper for easy removal.

2. 2. In a microwave-safe bowl, melt the chopped chocolate in 30-second intervals, stirring in between, until the chocolate is smooth and silky.

3. 3. In a large bowl, combine the melted chocolate, vanilla Greek yogurt, sugar, and milk. Stir until the mixture is well-combined and smooth.

4. 4. In a separate bowl, whisk together the all-purpose flour, cocoa powder, and baking soda.

5. 5. Gradually fold the dry ingredients into the wet mixture, stirring just until the batter is combined. If using chocolate chips, gently fold them in at this stage.

6. 6. Pour the batter into the prepared baking pan and smooth the top. Bake for 25-30 minutes or until a toothpick inserted into the center comes out mostly clean.

7. 7. Allow the brownies to cool completely in the pan before cutting into squares. Enjoy your delicious Greek Yogurt Brownies!