Cinnamon-Brown Sugar Pop-Tart® Cake

• cooking spray
• 6 cinnamon-brown sugar toaster pastries (such as Pop-Tarts(R))
• 5 tablespoons unsalted butter, melted
• 3/4 cup brown sugar, divided
• 1 tablespoon all-purpose flour
• 4 teaspoons ground cinnamon, divided
• 1 teaspoon milk
• 1/2 cup unsalted butter, softened
• 1/2 cup white sugar
• 1 egg, separated
• 1 1/2 teaspoons vanilla extract
• 1 cup all-purpose flour
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon salt
• 3/4 cup milk
• 1 1/2 teaspoons white vinegar
• 1 cup cream cheese frosting, or to taste

1. Preheat oven to 325 degrees F (165 degrees C). Spray an 8-inch square pan.
2. Crumble 4 toaster pastries into a bowl and mix in melted butter; press into the prepared pan creating a crust.
3. Combine 1/4 cup brown sugar, 1 tablespoon flour, 1 teaspoon cinnamon, and 1 teaspoon milk in a bowl; spread over crust.
4. Beat 1/2 cup brown sugar, softened butter, and white sugar together in a bowl; add egg yolk and vanilla extract and mix well. Combine 1 cup flour, baking powder, and salt in a separate bowl. Whisk 3/4 cup milk and vinegar together in a separate bowl.
5. Mix flour mixture, alternating with milk-vinegar mixture, into butter mixture until batter is well mixed. Fold egg whites into batter. Crumble 1 toaster pastry over batter and fold. Pour batter over the crust.
6. Bake in the preheated oven until a toothpick inserted in the center comes out clean, 45 to 50 minutes. Cool cake completely, at least 1 hour.
7. Spread frosting onto cake and crumble 1 toaster pastry over frosting.

cooking spray, cinnamonbrown sugar toaster pastries, unsalted butter, brown sugar, flour, ground cinnamon, milk, unsalted butter, white sugar, egg, vanilla, flour, baking powder, salt, milk, white vinegar, cream cheese frosting

Taken from www.allrecipes.com/recipe/244648/cinnamon-brown-sugar-pop-tart-cake/ (may not work)