Place the 3 cups of chocolate chips in a microwave safe bowl. Melt the chocolate by microwaving on high for 30 seconds and then stirring. Microwave for 15 seconds, then stir again. Repeat this process until the chocolate is smooth.

Pour about 2/3 of the melted chocolate onto wax paper on a cookie tray. Spread the chocolate out with a rubber spatula until the chocolate layer is about 1/4" thick.

Pour the coarsely crushed pretzels out over the melted chocolate evenly.

Add the caramel bits to a microwave safe bowl with a 1/8 of a cup of milk or cream. Microwave on high for 30 seconds and then stir before microwaving again for 15 seconds, stirring after. Continue the 15 second increments and stirring until the caramel and milk are smooth. Stir in vanilla.

Spoon the caramel over the pretzels and chocolate. Sprinkle on sea salt.

Spoon the remaining chocolate over the mixture. Add sprinkles if desired.

Let harden in the fridge for at least an hour prior to breaking it apart.