For the crust:

• 1 stick unsalted butter, room temperature
• 1/2 cup packed brown sugar
• 1 cup all-purpose flour

For the top layer:

• 1 cup packed brown sugar
• 2 teaspoons vanilla extract
• 2 tablespoons all-purpose flour
• 1 teaspoon baking powder
• 1/2 teaspoon salt
• 1 cup shredded coconut
• 1 cup chopped pecans
• 1 egg, beaten
• 1 (14 oz) can sweetened condensed milk

For the crust: