Pumpkin Coffee Cake with a Brown Sugar Glaze

Step 1
Preheat oven to 350 degrees F (175 degrees C). Grease a 9×13-inch baking pan with 1 teaspoon butter.

Step 2
Mix pumpkin puree, eggs, water, 1 tablespoon vanilla extract, and pumpkin pie spice together in a large bowl. Stir in yellow cake mix and baking soda until just combined. Pour batter into the prepared baking pan.

Step 3
Mix 1/2 cup brown sugar, flour, and melted butter in a small bowl until crumbly; sprinkle over the batter with your fingers.

Step 4
Bake in the preheated oven until a toothpick inserted into the center comes out clean, 25 to 30 minutes.

Step 5
Combine 1/2 cup brown sugar, heavy cream, white sugar, and 1 teaspoon vanilla extract in a saucepan; bring to a simmer over medium heat. Remove from heat and stir until brown sugar and white sugar are dissolved and glaze is smooth.

Step 6
Poke holes all over the top of the cake with a toothpick. Pour glaze evenly over cake.