Pre-heat oven to 350 degrees F (180 C) and grease an 8x8 or 11x7 inch glass pan with oil or line with parchment. Cream butter and sugar together. Add coconut milk, salt, baking powder, vanilla, and cinnamon. Beat until smooth. Add the flours and mix just until combined.

Divide the dough in half and press half of it into the prepared pan as evenly as possible. Place pan in oven and bake for 10 - 12 minutes or until the top begins to brown slightly. While the base layer bakes crumble the remaining dough up into clumps in the bowl and add the chocolate chips and marshmallows and toss to mix evenly.

Remove the base layer from the oven once starting to brown and sprinkle on the mixture of dough, marshmallows, and chocolate as evenly as possible. Return to oven and bake for 12 - 15 minutes until top is golden. Remove and cool completely then cut into squares and serve!