You can swap sesame flour for 30g fine hazelnut flour or almond flour.
For a slightly crispy outer layer, sprinkle some unsweetened cocoa powder over the buttered moulds before you fill them.
It's fine to bake fondants in silicone muffin moulds - they turn out perfectly every time and they're easy to un-mould due to the flexible material.
Once you fill the moulds, you can freeze them for up to 1 month - bake from frozen with an extra 5 minutes baking time.
The best way to ensure accurate measurement of ingredients is with Metric Kitchen Scales. They are inexpensive and take up very little space. Click
HERE for the ones I use.