Measure your peanut butter and honey and mix together in a large sauce pan. Cook on low heat until melted. Mix until smooth.
Remove the pan from heat and turn off the burner.
Add carrots, oatmeal, raisins, and coconut to the saucepan. If desired, add in any optional mix-ins. Stir well, and let it cool until you can safely touch it with your hands.
Put the mixture into the baking pan and press firmly into the bottom.
Bake for 25 minutes and then cut into 24 square bars. If you want long rectangular bars like what you purchase at the store, then use a larger, thinner pan.