Creating your very own Pumpkin Coffee Cake can be effortless if you follow these clear steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan.
2. Mix the Dry Ingredients: In a medium bowl, whisk together 2 cups of flour, baking powder, baking soda, salt, cinnamon, nutmeg, and ginger.
3. Combine the Wet Ingredients: In a large mixing bowl, stir together the pumpkin puree, granulated sugar, brown sugar, oil, eggs, and vanilla extract until fully combined.
4. Add Dry to Wet: Gradually add the dry mixture to the wet ingredients, mixing until just combined. Be careful not to overmix; a few lumps are fine.
5. Incorporate Nuts (if using): Gently fold in chopped walnuts if you like a bit of crunch.
6. Prepare the Streusel Topping: In a separate bowl, mix together the flour, brown sugar, and cinnamon. Cut in the softened butter until the mixture resembles coarse crumbs.
7. Fill the Pan: Pour the batter into the prepared baking pan and spread it evenly.
8. Add the Streusel: Sprinkle the streusel topping generously over the batter.
9. Bake: Place the pan in the preheated oven and bake for 40–45 minutes, until a toothpick inserted in the center comes out clean.
10. Cool: Once baked, remove the cake from the oven and allow it to cool in the pan for about 15-20 minutes before transferring it to a wire rack to cool completely.

Following these steps will guide you in effortlessly creating this incredible Pumpkin Coffee Cake that impresses every time!