Yummy strawberry ice cream sandwiched between two biscuits.
Where you can buy online
TeePublic (US and UK)
RedBubble (US)
Threadless (US)
NeatoShop (US)
Design By Humans (US)
You can find the design on t-shirts in most stores, but also on other products depending on the store (e.g. hoodies, mugs, stickers, notebooks, phone cases, greeting cards, cushions, socks etc).