Mineral Blocks

Anybody have a favorite mineral block for deer, this year will be my first time to use them and I don't have a clue as to which one to get

I prefer to make my own. The deer on my lease love it. You need a thermometer for this

2 Cups of sugar
1 cup of water
3 Tablespoons of butter
1 cup of molasses
1 tablespoon of salt

Place all in a large pot and mix together. Put the stove on medium-high and let boil. The mixture will need to reach 270-280 degrees Fahrenheit. Then take the pot off the eye and let it cool until The mixture starts to thicken. Once it does, poor it into an container (mold). I usually use a butter tub. I sometimes place a stick in the block to assist with easy removal.
The butter is the key ingredient.

50 lb salt block $9 at tractor supply works good for me