Preheat oven to 425
Line a baking sheet with parchment paper
Unroll one of the puff pastry sheets and place on baking sheet
Spread the nut butter over the pastry sheet
Unroll the second pastry sheet and place on top of the first one
Use a small, star-shaped cookie cutter to cut out a star from the corner of the layered sheet and set aside
Cut the remaining layered pastry sheet into the shape of a Christmas Tree (triangle) with a wide base and pull away the excess pastry
Cut branches into the sides of the triangle about 2 cm wide leaving the top about 5 cm wide as this will be covered with the pastry star
Start at the top and twist each branch away from you- giving two turns to each branch
Place the pastry star at the top securing with a beaten egg
Spread the beaten egg over the entire pastry
Bake for 12-15 minutes or until golden brown and risen
Cool before transfering to a wire rack
Transfer to a serving plate and dust with icing to serve