I made this cake for my son’s 3rd birthday. It’s two 9×13″ rectangles stacked. I used Betty Crocker box mixes and Betty Crocker frosting from the can for the top. For the filling in the middle I used Wilton’s Whipped Cream dry mix from the box and put a layer of sliced strawberries between it. Because of the strawberry and whipped cream filling it had to stay refrigerated.
For the decorating on top I used a store bought black frosting with a store bought round tip attachment to free hand outline Wubbzy, and later for his face. All the other icing was Wilton Ready to Use Decorator Icing tinted to the different colors. I used a regular Wilton round tip then flattened all of it with a finger dipped in cornstarch. The grass was done with a Wilton grass tip.