You need something slimy, sweet, and beautiful to make the love potion. Below are the set of cheats ingredients to help you. Create and place the following items into the cooking pot.

Set 1: Snail, Sugar, Flower
Set 2: Slime (Monster), Apple, Star
Set 3: Snot, Banana, Moon

Pick up the potion and use it on the monster.

Scribblenauts Remix 2-10 Cheats Hints gallery:
2-10-1-a: Help the witch make a love potion! Fill the cauldron with sweet, slimy and beautiful things. Adjectives cannot be used.
2-10-1-b: Think of foods that are sweet.
2-10-1-c: Amphibians are slimy and jewels are beautiful.

2-10-2-a: Help the monster fall in love.
2-10-2-b: Bring the potion to the monster.
2-10-2-c: Pick up the potion and give it to the monster.