In a large bowl, mix together the flour, baking powder, baking soda, and salt. Set that aside.
In a liquid measuring cup or medium bowl, add the buttermilk, egg, and melted butter and whisk well until fully combined.
Pour the wet ingredients into the bowl with the dry ingredients. Mix until fully combined. There might be a few lumps left in the pancake batter and that is ok. Add the green food coloring to the bowl. 10 drops will make a light, green color. Do not overmix the batter as you will have tough pancakes.
Preheat a skillet or a non-stick pan over medium low to medium heat and melt 1 tablespoon of butter onto the griddle.
Pour a ½ cup of batter onto the hot griddle. If you want smaller pancakes, use ¼ cup or an ice cream scoop. Allow the pancakes to cook for 2-3 minutes on the first side. When you see air bubbles coming up through the pancake and the edges start to look dry, you are ready to flip the green Grinch pancakes.
With a spatula, carefully flip the pancakes over. Cook for them 2-3 minutes more until they are golden brown. Serve immediately.