Preheat the oven to 180℃.
Thaw the phyllo pastry. I prefer to leave it in the fridge overnight.
Count 6 sheets of phyllo pastry. Stack them together. Lay it with the length side towards you.
Cut into 4 equal parts width wise. Lengthwise it will be into 3 strips.
Totally you should have 12 pieces or stacks.
Cover them with a damp cloth till you are ready to use them.
Melt the butter. I do that in the microwave oven for 15-20 seconds.
Brush the muffin tins lightly with some butter.
Take one stack, separate all 6 sheets. Brush one with melted butter, lightly.
Cover with another sheet. Brush with melted butter. Repeat till you have a stack of 6 sheets.
Place the stack over the muffin tin cup. Gently press it down into the cup using your fingers or a small jar or glass.
Repeat the same process with the remaining 11 stacks.
Bake the empty phyllo cups for 5-7 minutes or until light golden in colour.
Cut the brie cheese into about 1 tsp pieces or just under 1 inch cube.
Remove the half bake phyllo cups from the oven.
Add one piece of brie cheese in each cup.
Bake the phyllo cups for 5 minutes.
Remove the phyllo cups from the oven.
Transfer them to a wire rack to cool.
Add about 1 tsp of cranberry sauce in each cup.
Sprinkle some pistachio slivers over the sauce.
Cranberry Brie Bites are ready.