The Best Lemon Bars Sweet and tangy lemon filling on a buttery shortbread crust. Tips and tricks for making the perfect lemon bar! I've been making lemon squares for as long as I can remember.  Since my Mom is a huge lemon dessert fan, we tried all kinds of lemon desserts in our home and lemon bars reigned supreme. The key to making a killer lemon bar is a punch of tangy lemon flavor. The homemade lemon filling what makes or breaks a lemon square. I have tried so many different recipes and sometimes the lemon flavor barely comes through!

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