Pumpkin Bread With Chocolate Swirl

Name: Pumpkin Bread With Chocolate Swirl
Ingredients: 4 tablespoons unsalted butter, at room temperature, plus more for the pan; 1 1/2 cups all-purpose flour, spooned and leveled, plus more for the pan; 6 ounces semisweet chocolate, chopped melted; 1/4 cup plus 2 teaspoons canola oil; 2 teaspoons ground cinnamon; 1/2 teaspoon baking soda; 1/4 teaspoon baking powder; 3/4 teaspoon fine salt; 1 cup sugar; 1 cup pure pumpkin puree; 2 large eggs, lightly beaten; 1 teaspoon pure vanilla extract