Preheat oven to 350 degrees and fill two muffin tins with paper cupcake liners.
Sift together the flour, baking soda, salt and cinnamon into one bowl and set aside.
In a separate bowl, combine mashed bananas, brown sugar, sugar, butter, milk rum and egg and blend completely.
Add the dry ingredients a bit at a time and blend completely after each addition.
Fill the muffin cups about 3/4 full.
Bake for 15 to 17 minutes, or until the muffins have a rich golden color and spring back when pressed gently.
Top with Rum Glaze (optional)
While the muffins are baking prepare the rum glaze.
Mix the three rum glaze ingredients until the sugar is dissolve.
Brush over the bananas foster muffins while they’re still warm from the oven.
Garnish with a dollop of cream cheese frosting and coarse purple sugar and coarse green sugar.