3 Milk Buckets
2 Sugar
1 Egg
3 Wheat
Open a Crafting Table
Place 3 Milk Buckets across the top row
Place 1 Sugar in the middle-left slot
Place 1 Egg in the middle-center slot
Place 1 Sugar in the middle-right slot
Place 3 Wheat across the bottom row
Take the Cake from the crafting result
Place the Cake on a solid block to eat it