Waffles in a cup?

[femkes_follies]

1/2 liter of milk
1 pinch salt
2 whole eggs and 2 yolks
1/2 vanilla pod
1 soup spoon rum
100 grams flour
250 grams caster sugar

Now, does this not (removing the flavorings) bear a pretty strong resemblance to a period wafer recipe?

These are meant to be baked in a cup.

Think I'll try them in my popover pan.

Thoughts?