Ingredients

For the Cake:
• 1/2 pound (2 sticks) unsalted butter, at room temperature
• 2 1/2 cups granulated sugar, divided
• 4 extra-large eggs, at room temperature
• 1/3 cup grated lemon zest (6 to 8 large lemons)
• 3 cups flour
• 1/2 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1 teaspoon kosher salt
• 3/4 cup freshly squeezed lemon juice, divided
• 3/4 cup buttermilk, at room temperature
• 1 teaspoon pure vanilla extract
For the Glaze:
• 2 cups confectioners' sugar, sifted
• 3 1/2 tablespoons freshly squeezed lemon juice

Instructions

1. Preheat the oven to 350 degrees F. Grease and flour 2 (8 1/2 by 4 1/4 by 2 1/2-inch) loaf pans. You may also line the bottom with parchment paper, if desired.
2. Cream the butter and 2 cups granulated sugar in the bowl of an electric mixer fitted with the paddle attachment, until light and fluffy, about 5 minutes. With the mixer on medium speed, add the eggs, 1 at a time, and the lemon zest.
3. Sift together the flour, baking powder, baking soda, and salt in a bowl. In another bowl, combine 1/4 cup lemon juice, the buttermilk, and vanilla. Add the flour and buttermilk mixtures alternately to the batter, beginning and ending with the flour. Divide the batter evenly between the pans, smooth the tops, and bake for 45 minutes to 1 hour, until a cake tester comes out clean.
4. Combine 1/2 cup granulated sugar with 1/2 cup lemon juice in a small saucepan and cook over low heat until the sugar dissolves. When the cakes are done, allow to cool for 10 minutes. Remove the cakes from the pans and set them on a rack set over a tray or sheet pan; spoon the lemon syrup over them. Allow the cakes to cool completely.
5. For the glaze, combine the confectioners' sugar and the lemon juice in a bowl, mixing with a wire whisk until smooth. Pour over the tops of the cakes and allow the glaze to drizzle down the sides.

Ingredients

• 1 1/2 cups (3 sticks) unsalted butter, room temperature, plus more for pans
• 3 3/4 cups all-purpose flour, plus more for pans
• 2 1/2 teaspoons baking powder
• 3/4 teaspoon salt
• 2 1/2 cups granulated sugar
• 7 large eggs, lightly beaten, room temperature Eggs Large White
• 1 1/2 teaspoons pure vanilla extract
• 1 cup milk, room temperature Milk
• 1/2 teaspoon grated lemon zest
• 1/2 teaspoon grated orange zest
• 1/2 teaspoon grated lime zest
• 1/3 cup poppy seeds, plus more for sprinkling

Instructions

1. Heat oven to 350 degrees. Place two racks in center of oven. Butter three 8-by-2-inch round cake pans; line each with a circle of parchment paper. Butter paper, and dust pans with flour; tap out excess. Set aside.
2. Sift together flour, baking powder, and salt in a medium mixing bowl. Set aside.
3. In the bowl of an electric mixer fitted with the paddle attachment, cream butter on medium-low speed until lightened, 1 to 2 minutes. Gradually add sugar; beat until color has lightened, 3 to 4 minutes, scraping down sides of bowl once or twice. Drizzle in eggs, a little at a time, beating on medium-low speed after each addition until batter is no longer slick but is smooth and fluffy, about 5 minutes. Stop to scrape down bowl once or twice so batter will combine well. Beat in vanilla on medium-low speed.
4. Reduce the mixer speed to low. Alternately add reserved flour mixture and milk, a little of each at a time, beginning and ending with flour mixture. Scrape down the bowl once or twice. Beat in lemon zest, orange zest, lime zest, and 1/3 cup poppy seeds.
5. Divide batter evenly among the prepared pans. Bake 30 minutes, then rotate pans for even browning. Bake until a cake tester inserted into center of cakes comes out clean, 5 to 10 minutes more. Transfer to wire racks to cool, 15 minutes. Turn out cakes, and set on racks, tops up. Cool completely.
6. Remove parchment from bottom of each layer. Save best-looking layer for the top. Place one layer on the serving platter. Spread 1 1/2 cups cream-cheese frosting over the top. Place second cake layer on top, and spread remaining 1 1/2 cups frosting over top. Place reserved layer on top. Chill cake, loosely covered with plastic wrap, 1 hour.
7. To serve, stir lemon glaze well, then pour onto center of top layer of cake, letting it run down the sides. Using a single-hole zester, cut long strips of zest from orange and lemon, if desired. Arrange zest in loose spirals on the top of cake, and sprinkle lightly with poppy seeds.