In the bowl of a stand mixer, mix the stick of butter and ½ of the candy bar( the pulverized part) until well blended on a medium speed. You will need to stop the mixer several times and scrape down the sides. A hand mixer is fine to use too. If you are a zealot and have strong arms - then by all means, mix this by hand.

In a heavy duty frying pan on the stovetop over medium low heat (I used my grill pan), melt 2 Tbs unsalted butter.

While pan is preheating, spread the butter onto one side each of the four pieces of bread. (You will have about ¼ left over - or heck, use it all! Live a little). Then sprinkle well with the kosher salt and cayenne - this part is important - it imparts flavor.

Once the pan is heated, place two of the pieces of bread, butter side down onto the pan. Then place the pieces of cheese onto the bread. Then sprinkle the chocolate that is chopped into small pieces onto the cheese. Then cover this with the other two pieces of bread (making two sandwiches) - with the butter side up. Then cover the whole affair with the lid of a pan so that the cheese will steam and melt well.

Cook on one side for about 2 minutes, then turn to the other side - make sure to put the lid back on. If at any point, you start to smell a burning smell, turn the heat down and check your sandwich. Just know that sugary stuff burns easily - and you have to be careful with these.

Your sandwich is done when the cheese is melty and the bread is crusty and looks like a grilled cheese sandwich. Cut in half so that the chocolate inside will run down the side of the bread - ‘cause Oooo - wow! Serve immediately. Garnish with powdered sugar if you like.