In a small bowl, mix the salt dough ingredients together until they make a dough-like ball. If the dough is too dry, add a few drops of water until it softens up. Repeat for different colours.
Split the dough into 3 equal pieces, and roll them into your monster shapes (the shape of rocks works best. Don't make them too thick or they'll take forever to dry out in the oven).
Place the monster shapes on a parchment lined baking sheet.
Bake the monster shapes at 225F for 3 to 5 hours. Flip the shapes over after about 2 hours and continue baking until they are completely dried out.
Once cooled, draw monster faces on the salt dough shapes with a pencil. Paint over the pencil lines with white and black paint.
Optional - Seal the salt dough shapes with Matte Finish Mod Podge.
Glue different sizes of googly eyes onto your monster pets. I used Mod Podge to glue the eyes onto the sealed salt dough shapes.
Notes
-Each batch of this salt dough makes enough for 3 monster pets. Feel free to double or triple this recipe if you want to make more. -If the dough dries out a little while you work, cover the bowl with a wet paper towel for 15 minutes and it will soften up.