In a bowl mix together the ingredients: Keep this mixture in a jar until ready to use (it is a perfect fit for a pint-size jar).

Add 1/2 c. milk, 2 T. butter, and 1/2 t. vanilla to your jar of lava cake mix to make your batter.  Spray the inside of your crockpot with cooking spray or oil and pour the batter mixture in the bottom and top with a cup of chocolate chips.

In a separate bowl, mix together 3 teaspoons of cocoa, 1 and 3/4 cup of hot water, and 3/4 cup of sugar. Stir until the sugar is dissolved.

Pour the liquid mixture on top of the batter and the chocolate chips. Cook on high in your slow cooker for about 2 hours. (But make sure you watch the sides for burning and turn it down if it gets too well done too fast.) After 2 hours turn it down to low and cook it about another 2 hours. The times and temps will vary depending on your crockpot and the size of your crockpot.