Toast the Pecans: In a small skillet, melt 1 cup butter and add the chopped pecans. Toast them on low heat until golden and fragrant. Set aside to cool.
Cream the Butter and Sugars: In a large mixing bowl, beat softened butter with granulated sugar and brown sugar until light and fluffy. This gives the cake its tender crumb.
Add Eggs and Vanilla: Mix in the eggs, one at a time, followed by vanilla extract.
Combine Dry Ingredients: In another bowl, whisk flour, salt, and baking powder.
Mix Wet and Dry: Alternate adding the flour mixture and buttermilk to the butter mixture. Start and finish with flour. Mix just until combined.
Fold in Pecans: Gently stir in the toasted pecans.
Bake the Cake: Pour batter into a greased bundt pan or loaf pans. Bake at 325°F (165°C) for about 1 hour 15 minutes, or until a toothpick comes out clean.
Make the Glaze: In a small saucepan, combine butter, sugar, water, and vanilla. Bring to a gentle boil, then simmer until slightly thickened.
Finish with Glaze: Pour the warm glaze over the cake once it’s cooled for 10 minutes. This step gives the cake a shiny finish and adds sweetness.