Step 1: Preheat Oven and Prepare Pan: Preheat the oven to 350F (175C). Grease and flour a 9x13 inch baking pan. This prevents the cake from sticking and ensures easy removal.
Step 2: Combine Wet Ingredients: In a large bowl, whisk together the cake mix, water, melted butter, and eggs until well combined. The batter should be smooth with no lumps.
Step 3: Incorporate Pecans: Gently fold in the toasted pecans until they are evenly distributed throughout the batter. This ensures every slice has a nutty crunch.
Step 4: Bake the Cake: Pour the batter into the prepared pan and spread evenly. Bake for 30-35 minutes, or until a wooden skewer inserted into the center comes out clean.
Step 5: Cool the Cake: Allow the cake to cool in the pan for 10-15 minutes before inverting it onto a wire rack to cool completely. This prevents the cake from crumbling.
Step 6: Prepare the Glaze: In a small bowl, whisk together the powdered sugar, milk or cream, and vanilla extract until smooth. Add more liquid if needed to achieve desired consistency.
Step 7: Glaze the Cake: Once the cake is completely cooled, drizzle the glaze evenly over the top. Allow the glaze to set before slicing and serving.
Optional Tips and Substitutions: For a richer flavor, substitute melted brown butter for the melted unsalted butter. Add a tablespoon of bourbon to the glaze for an extra layer of warmth. Walnuts or almonds can be used in place of pecans.