Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking dish.
In a large bowl, mix together the pumpkin puree, evaporated milk, eggs, sugar, cinnamon, and salt until well combined. Pour into the prepared baking dish.
Sprinkle the entire box of yellow cake mix evenly over the pumpkin mixture. If using, scatter the chopped pecans over the cake mix.
Drizzle the melted butter evenly over the top.
Bake in the preheated oven for about 60 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean.
Let the cake cool completely before serving. Serve with whipped cream or vanilla ice cream.
Notes
• Make sure to spread the cake mix evenly for a uniform crunch.
• For a more pronounced pumpkin flavor, add a teaspoon of pumpkin pie spice to the mix.
• Bake until the top is golden brown to ensure a satisfying crunch.
• Let the cake cool completely before cutting to help it set.
• Serve with a dollop of whipped cream or vanilla ice cream for extra indulgence.