Lemony Pecan-Buttermilk Cake
["3 c. sifted cake flour", "2 tsp. baking powder", "1/2 tsp. salt", "1 c. butter, softened", "2 c. granulated sugar", "1 1/4 tsp. vanilla", "1/4 tsp. lemon oil (optional)", "5 eggs", "2/3 c. buttermilk", "1/4 c. finely shredded lemon peel", "1/2 c. lemon juice (4 to 6 regular lemons, 8 to 10 Meyer lemons)", "1 1/2 c. pecans, toasted", "1/4 c. granulated sugar", "2 Tbsp. lemon juice"]
["Preheat oven to 350\u00b0. Grease and flour a 10-inch fluted tube pan. Set pan aside."]
["cake flour", "baking powder", "salt", "butter", "sugar", "vanilla", "lemon oil", "eggs", "buttermilk", "lemon peel", "lemon juice", "pecans", "granulated sugar", "lemon juice"]