Yes, cake is a Scrabble word!
...and is worth 10 points in Scrabble, and 11 points in Words with Friends
cake
Verb
1. Form a coat over
Noun
1. A block of solid substance (such as soap or wax)
2. Small flat mass of chopped food
3. Baked goods made from or based on a mixture of flour, sugar, eggs, and fat
What Scrabble words can I make with the letters in cake?
3 Letter Words
2 Letter Words