1/2 cup
(113 grams) soft butter, plus more for the pan
1 3/4 cups
(224 grams) all-purpose flour, plus more for the pan
1 3/4 cups
(323 grams) brown sugar
2 tablespoons
neutral oil
3
eggs, at room temperature
1 cup
(227 grams) pumpkin purée
2 teaspoons
vanilla extract
1/2 teaspoon
ground cinnamon
1 teaspoon
kosher salt
1 tablespoon
baking powder
1/2 tablespoon
baking soda
one 12 ounces
(340-gram) bag semisweet chocolate chips
1/2 cup
(123 grams) full-fat buttermilk