To make the custard, in a saucepan, heat the almond milk, vanilla powder, and honey until just before it simmers. In a separate bowl, mix the egg yolks. Pour a small amount of almond milk into the yolks, beating thoroughly to prevent them from curdling. Slowly pour a steady stream of milk into the egg mixture until all combined. Return to a double boiler or heat proof bowl above steaming water and cook over a low heat until the custard thickens, stirring constantly.