Preheat the oven to 166c / 330F.
Place 12 cupcake liners into a mini muffin pan.
Place the biscuits in a food processor and process into a fine crumb.
60 grams Marie Biscuits
Melt the butter and stir it into the biscuit crumbs ensuring that they are well coated.
40 grams unsalted butter
Spoon the biscuit mixture evenly into the cupcake liners. Press down firmly with the back of a spoon. You can place a clean cupcake liner on top of the biscuit base and press down with your fingers to get it nice and firm. Set to one side.
Place the cream cheese, egg and vanilla extract into a large bowl. Use a hand mixer to whip everything together. This will take a couple of minutes.
150 grams cream cheese, 1 egg, 1 tablespoon vanilla extract
Add in the condensed milk, and mix again with the hand mixer til everything is incorporated.
100 ml condensed milk
Add in 30g of pistachio paste and hand mix again til incorporated.Stir the mixture by hand to pop any large bubbles.
30 grams pistachio paste
Gently pour the cheese mixture on top of the biscuit base in the cupcake liners. Leave a good sized gap at the top to hold your topping. Pop any large bubbles using a toothpick.
Bake in the preheated oven for 7 minutes. The cheesecakes are done when the middles have risen and they are slightly darker in color. When you move the tin, they should have a slight wobble to them, but be firm on top.
Set to the side to let cool completely.