Caramel Bars with Crumb Topping

Bahan-bahan (24 porsi)

• 1 cup (2 Sticks) unsalted butter, (at room temperature)
• ½ cup granulated white sugar
• ¼ teaspoon salt
• 1 teaspoon vanilla extract
• 2½ cups all purpose flour, (divided)
• ¼ cup (½ stick) unsalted butter
• 1 tablespoon light corn syrup
• ¼ cup packed dark brown sugar
• One 14 ounce can sweetened condensed milk