New York Crumb Cake

Ingredients

• 2 tablespoons canola oil, plus more for pan
• 4 cups all-purpose flour, divided, plus more for pan
• ½ cup granulated sugar
• 2 ½ teaspoons baking powder
• ½ teaspoon salt
• 1 large egg
• ½ cup milk
• 2 teaspoons vanilla extract
• 1 cup packed light-brown sugar
• 1 ½ teaspoons ground cinnamon
• 1 cup (2 sticks) unsalted butter, melted and cooled, room temperature
• Confectioners' sugar, for dusting

Instructions

1. 1
   Place rack in center of oven, and heat oven to 325°. Lightly brush a rimmed quarter sheet pan or a 9-by-13-inch baking pan with canola oil and line with parchment paper. Secure parchment to pan with binder clips. Brush parchment with oil and dust with flour, tapping to remove excess. Set aside.
2. 2
   In a medium bowl, sift together 1 1/2 cups flour, granulated sugar, baking powder, and salt; set aside. In a second bowl, whisk together egg, milk, canola oil, and vanilla. Using a rubber spatula, fold dry ingredients into egg mixture.
3. 3
   Spread batter evenly into prepared pan, and set aside. In a medium bowl, combine remaining 2 1/2 cups flour, brown sugar, and cinnamon. Pour melted butter over flour mixture, and toss with a rubber spatula until large crumbs form. Sprinkle crumbs over batter.
4. 4
   Transfer pan to oven, and bake, rotating pan after 10 minutes. Continue baking until a cake tester comes out clean, about 10 minutes more.
5. 5
   Transfer baking pan to a wire rack to cool. Dust with confectioners' sugar. Using a serrated knife or bench scraper, cut into 3-inch squares. Store in an airtight container for up to 3 days.