Preheat the oven to 350 degrees Fahrenheit.
In a large bowl, mix together the oat flour, coconut oil, maple syrup/honey, baking powder, cinnamon, ginger, allspice, nutmeg and salt. The mixture should be easily moldable without falling apart.
Grease a loaf pan and press the mixture into the bottom of the pan to form an even layer.
Disperse the marshmallows and chocolate chips in an even layer across the top of the crust, add as much or as little as you would like!
Cover the pan with tinfoil and bake for 12-15 minutes.
Uncover pan and broil on low for 1 minute until the marshmallows are toasted.
Let it cool completely before cutting into bars. Enjoy!