You could even try it to see what your hamster will taste. (Don't taste from the exact piece you will give to your hamster, in order to avoid passing germs to your pet).
Step 1: Ingredients
1 tablespoon of yogurt (or less)
1 tablespoon of coconut powder (or less)
1 slice of banana
Step 2: Mixing the Ingredients
Break the walnut into tiny pieces.
Melt the banana slice with a fork.
Mix the walnut pieces with the melt banana, the coconut powder and the yogurt.
Step 3: Cutting and Drying the Cherries
Cut the cherries into thin slices. Then, use kitchen paper to dry the slices, so that they are suitable for the next step (apply paper in both sides).
Step 4: Layering
Take one slice of cherry and apply your mixed ingredients on top of it. Repeat once or twice.
Step 5: Testing the Product
The amount of 'cake' shown in the picture is way too much for a hamster, 1/3 should be enough.
Such sweet foods should be given in moderation to hamsters, and not frequently.