They're called 'Barquettes' in French (it means little boat)
Once the ingredients are ready to be used, they take less than 20 minutes to make.
120 g white flour (or 140g of gluten free baking mix)
100g sugar (I use soft brown sugar but caster is also fine)
1 tsp of vanilla essence
Pre-heat the oven at 180 C (that's 356 F exactly, Miss FaeryBee).
Separate the whites and yolks.
Whisk the whites till very firm.
In a separate bowl, whisk the yolks and sugar together until pale and foamy.
Add the vanilla essence, quick whisk.
Add the flour and whisk more but on slow speed, until completely smooth.
In corporate the whites with a spoon, very gently (so you lose as little as possible of those air bubbles).
Spoon out walnut size amounts on oven tray covered with baking paper, trying to give them an oval shape if at all possible. Leave enough space around each as they will fluff up quite a bit.
Put in the oven for 10min (in fan-forced oven) to 15 minutes (in conventional oven).
Take them out and push a dip in their centre using a small spoon (a wet finger works even better).
Then fill the hole with choice of jam or (home-made) Nutella.
If you have much more self-control than we did, put them to cool in the fridge (we most certainly did not, although those we didn't eat are now hidden in the freezer, waiting to be placed in lunch box on an irregular basis).
I can't wait to hear what you think of those