ACORNS in this scene and the dog park to the left.
When you have 10 ACORNS, give them to the Squirrel; it will leave, revealing the FOOD COLORING.
Click on the FOOD COLORING and the Snow Cone Vendor will give you some.
Return to the Yum Yum Bakery by going right down Sizzle Street.
Give the Food Coloring to Stella.
Walk through the doors behind her to trigger a mini-game.
For each cookie, squirt the background color first, then the detail color. Slow clickers should click when the nozzle is at the right edge of the cookie.
3 Strikes and you lose the level and have to replay it.
If you squirt too far to the right, squirt again quickly to try and salvage the cookie.
Stella will give you the COOKIES when you are finished.