STEP 1: Place egg whites, cream of tartar, and vanilla extract in a stand mixer fitted with the whisk attachment. Beat ingredients on medium-high for 3-4 minutes until soft peaks form.
STEP 3: Once all of the granulated sugar has been added, continue to beat on medium-high for another 3-5 minutes until meringue holds stiff peaks and is glossy.
STEP 4: Add half of the meringue into the piping bag fitted with the 12 tip. Add food coloring to the stand mixer and beat until incorporated - add to the other bag fitted with the 1M tip.
STEP 6: To pipe the ghosts, use the white meringue and fill in the body of the ghost, flattening out the line with an offset spatula. Add your eyes and mouth.