Preheat your oven to 325°F (160°C). In a mixing bowl, cream together the vegan butter and half of the powdered maple sugar until smooth and fluffy. In a separate bowl, whisk the eggs with the remaining sugar until combined. Gradually add the egg mixture to the butter mixture, stirring until well blended. Mix in the vanilla extract, coconut milk powder, gluten-free pastry flour, salt, and baking soda until a thick batter forms.

Scoop small dollops of the cookie batter onto a baking sheet lined with parchment paper, spacing them about two inches apart. Bake in your preheated oven for 15-18 minutes, or until the cookies turn golden brown and firm to the touch. Once done, remove from the oven and allow the cookies to cool completely on a wire rack.

In a medium saucepan, heat your non-dairy milk over medium heat until it’s just about to boil. While the milk heats, whisk together the egg yolks, remaining maple sugar, vanilla extract, and a pinch of salt in a separate bowl until creamy and light. Carefully pour the hot milk into the egg mixture, whisking continuously to temper the eggs, then return the mixture to the saucepan.

Cook the pudding mixture over medium-low heat, stirring constantly for 5-8 minutes, or until it thickens to a custard-like consistency. Once thickened, remove from heat and stir in the vegan butter until completely melted and combined. Transfer the pudding to a bowl, cover it to prevent a skin from forming, and let it cool completely in the refrigerator or over a bowl of ice water.

Select a 9x13 inch dish for the assembly of your banana pudding. Start by laying down a single layer of the homemade gluten-free wafer cookies. Top this layer with half of the sliced bananas, followed by half of the cooled vanilla pudding. Repeat the layering process with the remaining cookies, bananas, and pudding, finishing with a layer of pudding on top.

Cover the assembled banana pudding with plastic wrap, ensuring it is airtight to keep the layers fresh. Refrigerate for at least 4-5 hours or overnight, allowing all the flavors to meld together beautifully. When ready to serve, slice into portions and enjoy.