Preheat oven to 350 degrees. Prepare a 12 cup muffin tin with cupcake liners. Spritz with non-stick cooking spray.
In a large mixing bowl, whisk together the flour, baking soda, baking powder, and salt. Create a well in the center.
In a separate bowl, whisk together the bananas, melted butter, and vanilla. Add the egg and whisk until well blended.
Pour the banana mixture into the well of the dry ingredients. Stir just until combined.
Using an ice cream scoop, divide the batter among the 12 cupcake liners.
Bake for 20 to 25 minutes or until a toothpick inserted in the center comes out clean.
Press the pointed end of an almond into the muffin to resemble a small ear. Repeat to create a second ear.
In the middle of the muffin, line up two fudge-covered mini Oreo cookies to be the groundhog’s cheeks. Press a chocolate morsel of the top where the Oreos meet to serve as the nose.
Above the nose, place a candy eye on each side.
To attach the miniature marshmallows, melt 1 tablespoon chocolate morsels and use a toothpick to apply a small amount of chocolate to each marshmallow. Press the marshmallow against the muffin below the “cheeks” using the chocolate as glue.