Cinnamon-Brown Sugar Pop-Tart® Cake

By maddee08

4.75 / 5

20min

45min

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cooking spray
6 cinnamon-brown sugar toaster pastries such as Pop-Tarts®
5 tablespoons unsalted butter melted
¾ cup brown sugar divided
1 tablespoon all-purpose flour
4 teaspoons ground cinnamon divided
1 teaspoon milk
½ cup unsalted butter softened
½ cup white sugar
1 egg separated
1 ½ teaspoons vanilla extract
1 cup all-purpose flour
1 ½ teaspoons baking powder
½ teaspoon salt
¾ cup milk
1 ½ teaspoons white vinegar
1 cup cream cheese frosting or to taste