Not too hard, and it gets easier with each one you do. So may require a little repetition/practice, so be patient and don't stress.
What you need: Your call, but I used a mixture of toddler spoon and forks, but baby spoons are just as good and of course, washcloths!
If you aren't adding to a cake and want to make a bouquet get a baby bottle. After this project I found a great Youtube video if you want to peak. She does this pretty similar to me, so don't worry if it's easier to copy that way then going photo to photo, step by step way with me. She also includes the last of the bouquet steps.
This is for a 2 tone rose. Fold each washcloth in half and lay like image above, grab your fork or spoon and start rolling.
It should be looking something like this, a tube of washcloth.
Grab your mid section an pull it's way up and over the top half. The little flap end will end up tucked in and you should be tight, no tape required.
Now push back the tops of each layer, giving it a petal like look.
End result should be something like this. If your spoons/forks are like mine there's a slight bend to it. If you are adding it to a diaper cake you may want to adjust the rose to the bend. It's easy just grab, close fist tight, and turn the fork/spoon to desired way.
My end product, if you need help with the diaper cake step see this blog post: Diaper Cake. I ended up doing 3 of each color on it's own and 2 duo tone. Used the leftovers to stuff the beanie topper.
Here's the steps condensed if it helps: