4Grease an 8x8x2-inch pan with cooking spray and line the bottom with parchment paper.
5Grease an 8x8x2-inch pan with cooking spray and line the bottom with parchment paper.
6Grease an 8x8x2-inch pan with cooking spray and line the bottom with parchment paper.
7Rub the granulated sugar and lemon zest together using fingers in a large mixing bowl.
8Rub the granulated sugar and lemon zest together using fingers in a large mixing bowl.
9Rub the granulated sugar and lemon zest together using fingers in a large mixing bowl.
10Whisk in the vanilla extract and vegetable oil.
11Whisk in the vanilla extract and vegetable oil.
12Whisk in the vanilla extract and vegetable oil.
13Whisk in the large egg and yolk.
14Whisk in the large egg and yolk.
15Whisk in the large egg and yolk.
16Whisk in the lemon juice and sour cream, baking powder, baking soda, and kosher salt.
17Whisk in the lemon juice and sour cream, baking powder, baking soda, and kosher salt.
18Whisk in the lemon juice and sour cream, baking powder, baking soda, and kosher salt.
19Fold in the sifted cake flour until just a streak of flour remains.
20Fold in the sifted cake flour until just a streak of flour remains.
21Fold in the sifted cake flour until just a streak of flour remains.
22Transfer the batter to the prepared pan.
23Transfer the batter to the prepared pan.
24Transfer the batter to the prepared pan.
25Bake for 30 to 33 minutes, rotating at the halfway point, until a toothpick inserted in the center comes out with moist crumb or two.
26Bake for 30 to 33 minutes, rotating at the halfway point, until a toothpick inserted in the center comes out with moist crumb or two.
27Bake for 30 to 33 minutes, rotating at the halfway point, until a toothpick inserted in the center comes out with moist crumb or two.
28Let cool for 10 to 15 minutes.
29Let cool for 10 to 15 minutes.
30Let cool for 10 to 15 minutes.
31Invert the cake right side up on a rack.
32Invert the cake right side up on a rack.
33Invert the cake right side up on a rack.
34Whisk confectioners
sugar and 1 to 2 tablespoons lemon juice in a small bowl until smooth, adding more lemon juice until a thick, pourable glaze is formed.
35Whisk confectioners
sugar and 1 to 2 tablespoons lemon juice in a small bowl until smooth, adding more lemon juice until a thick, pourable glaze is formed.
36Whisk confectioners
sugar and 1 to 2 tablespoons lemon juice in a small bowl until smooth, adding more lemon juice until a thick, pourable glaze is formed.