As with many recipes, tasks must be done in the correct order.  To successfully make Garlic Fries, please follow these steps in exact order:

1. grab uncooked fries
2. dump them in the fryer
3. grab cooked fries
4. tap the garlic clove in front of Cookie the Batting Chef (it will highlight in a green frame)
5. tap Cookie the Batting Chef (MOST IMPORTANT step!)

Cookie should swing his bat, knocking a tasty treat base-hit, and the Garlic Fries will appear on the catcher's mitt. Serve 'em up before they get cold!