01 -
In a large bowl, whisk together the warm milk, sugar, and yeast. Let stand until foamy, about 5–10 minutes.
02 -
Add the pumpkin purée, melted butter, egg, and vanilla extract to the yeast mixture. Mix until combined.
03 -
Stir in the flour, salt, and pumpkin pie spice. Knead the dough on a lightly floured surface for 8–10 minutes (or use a stand mixer with dough hook for 5–6 minutes) until smooth and elastic.
04 -
Place the dough in a greased bowl, cover, and let rise in a warm place until doubled in size, about 1 hour.
05 -
Punch down the dough and roll it out on a floured surface into a 16 x 12-inch (40 x 30 cm) rectangle.
06 -
Spread the softened butter evenly over the dough. Sprinkle brown sugar, cinnamon, and pumpkin pie spice over the buttered surface.
07 -
Starting from the long edge, roll the dough tightly into a log. Slice into 12 equal rolls.
08 -
Arrange the rolls in a greased 9x13-inch (23x33 cm) baking dish. Cover and let rise for 30–45 minutes, until puffy.
09 -
Preheat oven to 350°F (175°C). Bake rolls for 22–25 minutes, or until golden brown.
10 -
While rolls cool slightly, prepare the frosting: Beat together peanut butter and butter until creamy. Add powdered sugar, vanilla, salt, and 2 tbsp milk. Beat until fluffy, adding more milk if needed for a smooth, spreadable consistency.
11 -
Spread peanut butter frosting over warm (not hot) rolls. Serve fresh.