Butter Pecan Cake

Name: Butter Pecan Cake
Cook time: 1 h 20 min
Total time: 1 h 20 min
Cuisine: American
Ingredients: 1 cup (2 sticks) unsalted butter, room temperature; 1 cup sugar; 1 cup brown sugar; 5 eggs; 1 tablespoon vanilla extract; 2 1/2 cups all-purpose flour; 1 teaspoon baking powder; 1/2 teaspoon salt; 1/4 cup buttermilk; 2 cups pecans, roughly chopped; 1/2 cup (1 stick) unsalted butter, room temperature; 3/4 cup brown sugar; 2 tablespoons water; 1 tablespoon pecan extract or vanilla extract; 1/2-2 cups powdered sugar, plus more until desired consistency is reached