Step 1: Preheat oven to 350°F. Grease and line an 8x8-inch pan with parchment paper. This ensures easy removal and clean-up. I always make sure the parchment paper overhangs a bit on the sides to create "handles."
Step 2: Melt the white chocolate and set aside to cool slightly. You can do this in a microwave in 30-second intervals, stirring in between, or over a double boiler. You want it warm and melty, but not hot, so it doesn't scramble your eggs.
Step 3: In a blender or food processor, blend cottage cheese, eggs, vanilla, lemon zest, lemon juice, and sugar until smooth and creamy. This is where the magic happens! Blend until there are no visible lumps of cottage cheese. You want it silky smooth, like a dream.
Step 4: Add baking powder, salt, and melted white chocolate to the blender. Blend again until incorporated. This step mixes everything perfectly.
Step 5: In a medium bowl, add the flour and pour in the blended mixture. Mix until fully combined. I prefer to do this in a separate bowl to avoid over-blending the flour, which can make the bars tough. A spatula or whisk works perfectly here.
Step 6: Pour batter into the prepared pan and smooth the top. Get every last drop of that delicious batter!
Step 7: Sprinkle with white chocolate chips or add ½ cup berries (if not using chocolate). This is your chance to customize! Blueberries or raspberries are fantastic here, adding another layer of freshness.
Step 8: Bake until the center is just set and a toothpick comes out with moist crumbs. Keep an eye on them! Ovens vary, so start checking around the minimum bake time. The edges should be lightly golden, and the center should no longer jiggle when you gently shake the pan.
Step 9: Let cool completely before slicing. Chill for a denser, fudgy texture. Patience is key here, my dears! These bars firm up beautifully as they cool. For that truly fudgy, almost cheesecake-like texture, pop them in the fridge for a couple of hours.