Not a cookie, but it's maybe one of my most favorite things ever:
ingredients:
250 cl of cream
powerdered sugar(varies) start with 20-30g
packet of vanilla sugar
1 chocolate bar with crunchy fillings(Caramel and crisp flavours will do)
tools:
chopping board
decent chopping knife
bowl
mixer
baking spatula
sieve(optional)
-Get a chopping board and a sharp knife
-Get the chocolate bar ready, smash it with great force against the board several times
-Chop up the remaining bits of chocolate into tiny pieces, you can filter out the bits of chocolate dust by using a sieve (optional)
-Get a mixer ready, bowl would be useful too
-Pour in powdered sugar, cream and vanilla sugar into said bowl
-Start whipping it with the mixer, and by that i mean you have to tilt the bowl slightly during the process to incorporate more air into the mix
-This process takes a while, but once it starts to stiffen give it a taste and see if it needs more powdered sugar. Keep adding sugar untill it tastes to your liking
-You can tell it's properly whipped when you tilt the bowl and the mix doesn't slide across the bowl anymore. Generally i'd like it a little underbeaten(The mix is slowly moving), but you really shouldn't beat the mix beyond this point, otherwise it will taste pretty bad.
-Get a dough spatula, and gently incorporate the bits of chocolate into the mix.
-You don't want to store this for too long, the mix will deflate over time.
You don't really have to use it as topping(like on icecream/brownies/COOKIES) as it's good enough on it's own imo