01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - In a medium bowl, combine almond flour, sugar, egg white, softened butter, almond extract, and salt. Mix until smooth paste forms.
03 - Roll thawed puff pastry on lightly floured surface into 12x12 inch square.
04 - Cut pastry into 4 equal strips, then cut each strip in half to create 8 rectangles.
05 - Place about 1 tablespoon almond filling down center of each rectangle, leaving border around edges.
06 - Fold each rectangle in half lengthwise, covering filling. Seal edges by pressing gently.
07 - Make 3-4 cuts along sealed edge of each pastry with sharp knife. Gently curve into slight arc to fan out toes.
08 - Transfer to prepared baking sheet. Brush each bear claw with beaten egg, sprinkle with sliced almonds and coarse sugar if using.
09 - Bake for 18-22 minutes until puffed and golden brown.
10 - Allow to cool slightly before serving.