Using a cutting board, lightly sprinkle some powdered sugar onto the board and roll out the red fondant to 1/8 inch thickness.
Cut out 6 circles.
Repeat the steps with the blue fondant.
Take a fondant cutter and cut a triangle in the middle of the circle.
Separate the two parts and place the top of the red circle into the opening of the bottom of the blue circle as shown in the in-process image.
Lightly wet your finger with water and run it along the line where the two colors meet. The water will act as a glue.
Allow to dry for 1 hour.
Squeeze the yellow cookie icing into the piping bag.
Pipe out the star for Captain Marvel's logo.
Allow to dry for 2 hours.