Ingredients
Equipment
Method
Prep and make crumb topping
- Preheat oven to 350F and grease a 9x5 loaf pan.
- Cut cold butter into all-purpose flour, brown sugar, cinnamon, and nutmeg until large crumbs form, then refrigerate while you mix the batter.
Make batter and bake
- Whisk together the flour, baking soda, pumpkin pie spice, cinnamon, and salt in a bowl.
- Whisk together pumpkin, sugar, brown sugar, oil, eggs, vanilla, and sour cream until smooth.
- Fold wet ingredients into dry ingredients until just combined, then pour the batter into the greased loaf pan.
- Scatter the crumb topping very generously over the entire top so every inch is covered.
- Bake for 60-65 minutes total, until a toothpick comes out clean.
- Tent the loaf with foil after 35 minutes to protect the crumb from over-browning.
Notes
For the best streusel texture, keep the butter cold and refrigerate the crumb while you mix the batter so the topping stays chunky. Store tightly wrapped at room temperature for up to 3 days or in the refrigerator for up to 5 days; freeze slices up to 2 months. For a dairy-light option, use full-fat Greek yogurt in place of sour cream for a similar tang and moisture.
