Created by JoanWagnerTeller on May 3, 2020
Step 1: Preheat oven to 350' F.
Step 2: Grease and flour 2 round 8" or 9"x1½" pans (or a rectangular 9"x13"x2" pan).
Step 3: Use hand mixer to beat flour, sugar, baking powder, salt, milk, shortening, and vanilla in large bowl at low speed, scraping bowl constantly, 30 seconds.
Step 4: Beat 2 minutes on high, scraping bowl occasionally.
Step 5: Pour into pan(s).
Step 6: Bake 30-35 minutes for layers, 40-45 minutes for a rectangular cake, or until wooden pick inserted in center comes out clean and cake springs back when touched lightly in center.
Step 7: Cool layers 10 minutes, then remove from pan(s) and cool completely on rack.
Step 8: Fill layers with lemon filling.
Step 9: Frost with boiled white frosting or other frosting of choice.
Step 10: Mix the ¾ cup sugar, cornstarch, and the ¼ teaspoon salt in saucepan.
Step 11: Stir in the ¾ cup water gradually.
Step 12: Cook, stirring constantly, until mixture thickens and boils. Boil and stir 1 minute.
Step 13: Remove from heat and add lemon peel and butter or margarine. Stir in the lemon juice and food coloring (if desired). Cool.
Step 14: If filling is too soft, refrigerate until set.