Step 1: Toast the Pecans - Melt 2 tablespoons of butter in a skillet over medium heat. Add 2 cups of chopped pecans and toast for about 5 minutes until fragrant and golden brown. Set aside to cool.

Step 2: Prepare the Fudge Base - In a large saucepan, melt 2 sticks of unsalted butter over medium-high heat. Mix in 1 cup of granulated sugar and 1 cup of brown sugar, stirring for 2-3 minutes.

Step 3: Combine the Cream and Flavors - Stir in 1-1/8 cups heavy whipping cream, 1/4 teaspoon salt, and 1 tablespoon vanilla extract. Bring to a gentle simmer.

Step 4: Boil the Mixture - Increase heat to high until the mixture boils. Let bubble for 4 minutes while stirring occasionally.

Step 5: Add the Powdered Sugar - Remove from heat and add 4 cups sifted powdered sugar. Whisk until smooth.

Step 6: Incorporate the Toasted Pecans - Gently fold in the cooled toasted pecans.

Step 7: Set the Fudge - Pour the mixture into a greased or parchment-lined baking dish. Allow to set at room temperature for at least 3 hours before cutting into squares.