First, heat your oven to 350°F (175°C). Get a 9×13 inch baking pan ready by greasing it and dusting it lightly with flour, or you can line it with parchment paper to make cleanup easier.
Next, make the cake batter. In a large bowl, combine the butter pecan cake mix, melted butter, chopped pecans, water, vegetable oil, eggs, and powdered sugar. Use an electric mixer or a whisk to beat everything together on medium speed. Keep mixing until the batter is smooth and all the ingredients are fully combined.
Pour this batter evenly into your prepared pan. Place it in the oven and bake for about 30 to 35 minutes. To check if it’s done, stick a toothpick in the center if it comes out clean, the cake is ready.
Take the cake out of the oven and let it cool completely in the pan, resting it on a wire rack. While the cake cools, prepare the frosting. In a medium bowl, beat together the softened butter and cream cheese until the mixture is smooth and creamy.
Slowly add the powdered sugar, mixing well after each addition so the frosting becomes nice and smooth. Then, add the maple extract, vanilla extract, light brown sugar, and a pinch of salt. Beat everything until the frosting is fluffy and well blended.
Gently fold in the buttered pecan chips, making sure they’re spread throughout the frosting. Once the cake is fully cooled, spread the brown sugar cream cheese frosting evenly over the top.
If you like, sprinkle some extra chopped pecans or pecan chips over the frosting to make it look extra nice. Finally, slice the cake and enjoy!