Decadent Coffee Cake with Cinnamon Streusel Topping

To initiate the cooking process, preheat your oven to a temperature of 350 degrees Fahrenheit (175 degrees Celsius). Next, take a 9x13-inch baking dish and lightly coat it with butter or cooking spray to prevent the cake from sticking, then dust it evenly with flour.

Subsequently, prepare the streusel topping by combining granulated sugar, all-purpose flour, and a pinch of ground cinnamon in a medium-sized bowl. Utilize your fingers or a pastry blender to incorporate butter into the mixture until it resembles a coarse, uneven texture. Set this mixture aside for later use.

In a separate large bowl, combine all-purpose flour, granulated sugar, baking powder, and a pinch of salt. Continue to incorporate butter into the mixture until it reaches the same coarse texture as before.

In a separate, smaller bowl, whisk together an egg and milk until the mixture is smooth. Add a few drops of vanilla extract to this mixture, stirring it in thoroughly.

Gradually pour the egg mixture into the flour mixture, mixing until just combined. Be careful not to overmix at this stage.

Pour the cake batter into the prepared baking dish and sprinkle a generous amount of streusel topping evenly over the top.

Place the cake in the preheated oven and bake until a toothpick inserted into the center of the cake comes out clean, taking approximately 25 to 30 minutes.

Once the cake is done baking, allow it to cool completely before slicing and serving.