Pumpkin Spice Texas Sheet Cake

Name: Pumpkin Spice Texas Sheet Cake
Cook time: 1 h 45 min
Total time: 1 h 45 min
Cuisine: American, Southern
Ingredients: Baking spray; 1 (15-oz.) can pumpkin puree; 1 cup vegetable oil; 1 cup packed light brown sugar; 1/2 cup granulated sugar; 1/2 cup whole buttermilk; 2 tsp. vanilla extract; 2 large eggs, at room; 2 cups all-purpose flour; 2 tsp. pumpkin pie spice; 11/2 tsp. baking soda; 1 tsp. kosher salt; 1/2 cup unsalted butter; 1/2 (4-oz.) unsweetened; 3 Tbsp. whole buttermilk,; 3 Tbsp. spicy, fruity cola soft; 1/2 tsp. kosher salt; 3 cups powdered sugar; Chopped toasted pecans