This lovely sheet cake is bursting with lemony citrus flavor. It is perfect for feeding a crowd. The batter is made in a saucepan just like the chocolate Texas sheet cake we all know and love. But this version is brighter and tastes so fresh. Make one and see for yourself!
Grease a 13X18-inch jelly roll pan and preheat the oven to 350°F.
In a large bowl whisk together 2 cups all purpose flour, 1 teaspoon baking soda, ½ teaspoon salt, and 2 cups granulated sugar. Stir until completely combined.
In a small bowl, stir together ½ cup sour cream and 2 large eggs.
Place 1 cup butter, 1 cup minus 2 Tablespoons water, 2 teaspoons lemon zest, and 2 Tablespoons lemon juice in a medium sauce pan. Bring to a boil, stirring occasionally.
Add the hot butter mixture to the flour mixture and stir well. Stir in sour cream and egg mixture, and 1 teaspoon lemon extract until well combined. Pour into the prepared jelly roll pan.
Bake at 350°F for 17-20 minutes or until it tests done. Cool on a wire rack for 20 minutes while you make the icing.
Icing
Place the ½ cup butter and ⅓ cup milk in a sauce pan. Heat over medium heat until the butter is melted and the mixture just starts to boil. Remove from heat and stir in the 1 teaspoon lemon extract.
Gradually add the 3 cups powdered sugar, stirring the mixture until it reaches a good consistency for spreading.
After the cake has cooled for 20 minutes, spread the warm icing on the cake. Let cool completely on a wire rack.