Lemon Crumb Bars

Bahan-bahan (24 porsi)

• One 15-ounce can sweetened condensed milk
• ½ cup freshly squeezed lemon juice
• 1 teaspoon freshly grated lemon zest
• 1½ cups all purpose flour
• 1 teaspoon baking powder
• ½ teaspoon salt
• ⅔ cup butter, (at room temperature)
• 1 cup packed dark brown sugar
• 1 cup oats