I always start by preheating my oven to 350°F and lining two baking sheets with parchment paper. This small step matters more than people think, since a properly heated oven gives the cookies that soft, even rise. While the oven warms up, I set my ingredients out so everything is ready to go.
In a medium bowl, I whisk together the flour, baking powder, baking soda, salt, cinnamon, ginger, and cloves. Whisking instead of just stirring helps distribute the spices evenly, so you don't end up with a bite that's overloaded with cloves. I set this bowl aside while I move on to the wet ingredients.
In my stand mixer, I beat the brown sugar and oil together until they look smooth and combined. Then I add the pumpkin puree, eggs, and vanilla, mixing until the batter turns a rich, even orange color. This is the base flavor of your cookie, so take a moment to scrape down the bowl.
I add the dry ingredients into the wet mixture in two batches, folding gently with a spatula instead of overmixing. Overmixing activates the gluten and can make your cookies tough instead of soft. The batter should look thick, glossy, and slightly sticky when you're done.
Using my cookie scoop, I drop rounded portions of batter onto the prepared sheets, leaving about two inches between each one. I bake them for 10 to 12 minutes, until they spring back lightly when touched. I always rotate my trays halfway through for even baking.
This step tests my patience every time, but it's non-negotiable. I let the cookies cool on the tray for a few minutes, then transfer them to a wire rack. Filling warm cookies melts the frosting instantly, so I always wait until they're fully cool.
While the cookies cool, I beat the softened cream cheese and butter together until smooth and fluffy. Then I slowly add the powdered sugar and vanilla, beating until it holds soft peaks. If it feels too soft, I pop it in the fridge for ten minutes to firm up.
Finally, I match cookies up by size, then pipe or spread the filling onto the flat side of one cookie before topping it with another. I press gently so the filling reaches the edges without oozing out everywhere. And that's it your pumpkin whoopie pies are ready to enjoy.