You must get 3 stars in the 12 levels of the Campfire Cook Off expansion to get this achievement. No need to complete Kevin bonus levels. Here are Let's Play (these are guides to get the 4 stars, but 3 stars are enough):
1-1:
1-2:
1-3:
1-4:
2-1:
2-2:
2-3:
2-4:
3-1:
3-2:
3-3:
3-4: