How to do it…

1. Preheat oven to 190C or 375F.
2. Open your bar of Dairy Milk, separate the squares and try not to eat any. It's good to have an extra bar of Dairy Milk just in case you need more squares. You won’t, of course, so then you’ll have the extra bar just to eat. If you're using Hershey’s Kisses then take off the wrappers.
3. Beat the Trex/Crisco (shortening) and peanut butter in a large bowl until well blended. I do this in my KitchenAid standing mixer because, well, I’m lucky enough to have a KitchenAid standing mixer.
4. Now, add both sugars and beat again for a good long while, until fluffy. Add the egg, milk and vanilla and beat again. Whisk together the flour, soda (bicarb) and salt and dump this into the peanut butter mixture. You could take your time doing this and probably should if you are beating by hand, adding it bit by bit. If you have a mixer, that will do all your work for you so you don’t have to mess about with gradually beating it all in.
5. Next up, shape the dough into 1 inch balls and roll in granulated sugar. This is where I get creative and use colored sugar. Red and green for Christmas. Rock Chick pink, green or purple because I’m a Rock Chick. Whatever. Tinted sugar doesn’t make these taste better but they look awesome. By the by, back in the day, I bought my tinted sugar from Williams Sonoma. I looked it up and it isn't as easy to find as it once was, but Walmart has a great selection of colors online...and you can also DIY your own colors (Google it!).
6. Place on ungreased cookie sheet and bake eight to ten minutes (seven, if you have a fan-assisted oven) until lightly browned. When you pull these puppies out, immediately press the chocolate squares or kisses in the middle. Don’t fret when the cookies crack a bit around the chocolate, they’re supposed to do that.
7. Give them a minute or so on the tray, then slide those babies onto a wire rack and let them cool. This is going to take a while because you can’t really move or stack them until the cookie and the chocolate (which will melt into the cookie) hardens. Or, at this point, you can carefully pop one into your mouth and enjoy.