01 -
Grease and flour two 9-inch round cake pans, and line the bottoms with parchment paper circles.
02 -
Sift together both flours, baking soda, baking powder, salt, and sugar. Set aside.
03 -
In an electric mixer bowl, beat together vegetable oil, shortening, vanilla extract, and lemon extract at high speed until light and fluffy.
04 -
Add eggs one at a time, beating well after each addition.
05 -
Fold in the grated and finely chopped lemon zest.
06 -
Fold in dry ingredients alternately with buttermilk, starting and ending with dry ingredients. Mix until no lumps remain, but do not overmix.
07 -
Divide the batter evenly between the prepared pans. Bake at 325°F (163°C) for 30–35 minutes or until a toothpick comes out clean. Let cakes cool in pans for 10 minutes, then transfer to wire racks to cool completely.
08 -
Mix icing sugar, lemon zest, and butter until crumbly. Add lemon extract and milk gradually, beating until smooth and creamy.
09 -
Fill and frost the cooled cake layers. Spread frosting on top and center of the cake. Garnish with candied lemon zest, if desired.
10 -
Bring water and sugar to a slow boil. Add lemon zest strips and simmer for 15 minutes. Drain and cool on a wire rack. Slice into strips and coat with fine sugar.