Ultimate Lemon Bars | Commune Cooking | Umami

Ingredients

• Crust
• 1 cup (5 ounces) all-purpose flour
• ¼ cup (1 3/4 ounces) granulated sugar
• ½ tsp salt
• 8 tablespoons unsalted butter, melted
• Filling 1 cup (7 ounces) granulated sugar
• 2 TBSP all-purpose flour
• 2 tsp cream of tartar
• ¼ tsp salt
• 3 large eggs plus 3 large yolks
• 2 tsp grated lemon zest plus 2/3 cup juice (4 lemons)
• 4 TBSP unsalted butter, cut into 8 pieces
• Confectioners' sugar (optional)