Step 1

Preheat the oven to 350 degrees F. Spray a 13x9-inch pan with nonstick baking spray.

Step 2

In a large bowl, whisk together the flour, sugar, baking powder, salt and baking soda.

Step 3

Use an electric mixer to mix in the eggs, sour cream, butter, lemon zest and lemon juice. On low speed, beat for 1 minute, until blended. Scrape the sides and the bottom of the bowl with a rubber spatula. Beat on medium speed for 1 minute.

Step 4

Spread the batter evenly into the prepared pan.

Step 5

Bake for 40 to 45 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs attached. Let the cake cool completely in the pan on a wire rack.

Step 6

In a medium bowl, whisk together the powdered sugar, sour cream, butter, lemon zest and lemon juice until blended and smooth. Spread the icing over the top of the cooled cake.