In a medium bowl, whisk together flour, baking soda, cinnamon, pumpkin spice, and salt. Set aside.
1 cup all-purpose flour, 1 teaspoon pumpkin spice, 1 teaspoon ground cinnamon, ½ teaspoon baking soda, ½ teaspoon kosher salt
In a stand mixer (or with a hand mixer), beat butter, brown sugar, white sugar, and vanilla on medium speed until light and fluffy (about 3–4 minutes). Scrape down the sides halfway through.
½ cup unsalted butter, ½ cup light brown sugar, ¼ cup white sugar, 1 teaspoon vanilla extract
Beat in the egg and maple syrup for 1 minute. Add pumpkin puree and mix briefly (the mixture may look separated, that’s fine).
1 large egg, 2 tablespoons maple syrup, ¾ cup pumpkin puree
With the mixer on low, slowly add the dry mixture. Mix until just combined. Stir in oats and cranberries with a spatula. Cover the bowl and refrigerate the dough for at least 30 minutes (chilling is essential).
1 cup dried cranberries, 1 cup oats
Preheat oven to 350°F (180°C) and line a baking sheet with parchment paper.
Scoop about 2 tablespoons of dough (or use a cookie scoop) and place 6 dough balls on the sheet. Gently flatten each one. Bake 14–16 minutes, until golden and set at the edges.
Let cookies rest on the pan for 5–10 minutes, then transfer to a cooling rack.