Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper to prevent sticking and promote even baking.
In a large bowl, whisk together 2 cups all-purpose flour, 1 tablespoon baking powder, 1/2 teaspoon baking soda, 1/2 teaspoon salt, 1 teaspoon ground cinnamon, 1/2 teaspoon ground nutmeg, and 1/2 teaspoon ground ginger.
Add 1/4 cup cold, cubed unsalted butter to the dry ingredients. Using a pastry cutter or forks, work the butter into the flour until the mixture resembles coarse crumbs with pea-sized bits of butter.
In a separate bowl, whisk together 1 cup pumpkin puree and 1/2 cup buttermilk until smooth. Stir in 1 tablespoon chopped fresh sage.
Pour the wet ingredients into the dry mixture. Using a wooden spoon or spatula, gently fold until just combined. Be careful not to overmix; a slightly shaggy dough is perfect.
Turn the dough out onto a floured surface. Gently pat it into a 1-inch thick rectangle. Use a biscuit cutter or a glass to cut out biscuits, pressing straight down without twisting to ensure even rise. Gather scraps, gently press together, and cut more biscuits.
Place the biscuits on the prepared baking sheet, leaving a little space between them. Bake for 12-15 minutes, or until golden brown on top and cooked through.
While the biscuits bake, combine 1/4 cup softened unsalted butter with 1/4 cup honey in a small bowl. Mix until creamy and smooth.
Remove the biscuits from the oven and cool slightly on a rack. Serve warm with a generous smear of honey butter. Enjoy the warm, aromatic blend of pumpkin and sage complemented by sweet, creamy honey butter.