1. Get the milk into a trough or bucket.
2. Use flour with milk. You will get cake dough.
3. Use the cake dough with an oven. You will get a cake.
4. Use the knife on a fruit (check table of fruits you may use here) while having the cake in your backpack. If you've done this correctly, there will now be red decorations on your cake, forming your Decorated Cake.