Easy Lemon Crumb Bars Recipe - Perfect Sweet and Tangy Dessert - Zest Plate

Ingredients

• 8 tablespoons (1 stick) unsalted butter
• 3/4 cup packed dark or light brown sugar
• 3/4 teaspoon baking powder
• 3/4 teaspoon kosher salt, divided
• 1 1/4 cups old-fashioned rolled or quick-cooking oats
• 1 cup all-purpose flour
• 2 large or 3 medium lemons (for zest and juice)
• 1 (14-ounce) can sweetened condensed milk