Soak cranberries in a bowl of hot water for 10 minutes. Drain. Set aside. In a mixing bowl, add the flour, cane sugar, baking powder and vegan butter. Mix.Add vegan egg and plant milk. Stir cranberries into the dough. Roll out the dough between two pieces of parchment paper. Chill in the refrigerator for 1 hour. Carefully peel the top parchment. Cut the dough into triangles. Brush with vegan egg wash. Bake 15-20 minutes.
Coffee Custard
In a saucepan, bring the plant milk (put 1/4 cup of milk aside and mix with cornstarch) to a bare simmer with coffee and salt.Add cane sugar and cornstarch-milk mixture. Cook over low heat whisking until the custard thickens.