The “Brownie” Batter

• 3/4 cup all-purpose flour
• 3/4 cup granulated sugar
• 1/4 teaspoon salt
• 1/2 cup (1 stick) unsalted butter, softened
• 2 large eggs
• 2 tablespoons lemon zest
• 2 tablespoons lemon juice

• 1 rounded cup powdered sugar
• 4 tablespoon lemon juice
• 8 teaspoons lemon zest