01 -
Preheat oven to 350°F. Generously grease an 18x13 inch sheet pan with nonstick spray.
02 -
In a medium bowl, whisk together flour, baking soda, pumpkin pie spice, cinnamon, nutmeg, and salt until evenly mixed.
03 -
In a large bowl, whisk pumpkin puree, brown sugar, granulated sugar, vegetable oil, eggs, and vanilla extract until homogeneous.
04 -
Add dry ingredients to wet mixture and stir gently just until no flour pockets remain to maintain tenderness.
05 -
Spread batter evenly in prepared pan. Bake for 18 to 20 minutes. Test doneness with a toothpick; it should come out clean or with a few crumbs.
06 -
Melt butter in a small saucepan over medium-low heat. Add brown sugar and heavy cream, whisking constantly until boiling. Remove from heat and gradually whisk in powdered sugar until smooth.
07 -
Whisk bourbon and vanilla extract into frosting. Fold in toasted chopped pecans and salt for texture and flavor balance.
08 -
Pour warm praline icing over slightly cooled cake. Gently spread with spatula without spilling over edges. Allow frosting to set for about 1 hour before slicing.