I'm not sure if I could describe myself as good at cooking or not, I consider myself decently knowledgeable in the lore and theory, and I have in fact invented some receipt on my own (not many, but including Bearnaise soup. yes, Bearnaise soup, as in the sauce, except its a soup. sadly I don't have the receipt here at the moment. It's actually good), I also do some simple cooking regularly. However, I'm really never cook anything advanced, and I don't really enjoy practice itself, nor the subtilities of eating the result enough to get very good...
Anyway, my tip for you today is this thing I'm not exactly sure what to call in English. According to what I find on wikipedia Toffee, Fudge, or Knäck comes the closest.
To make it is simple: Mix 33% cream, 33% syrup, and 33% sugar (by volume), you may also ad some butter and something (test something: vanilla, spices, cacao, or something other random experimentally) for taste, and boil it (I think it's still called boil even if there is no water involved?) for a while. Depending how you want it, you cook it different amounts of time: short time and you get a sauce-like thing delicious on icecream, a bit longer, and you get a chewy candy, and last you may get a brittle candy, similar to the inside of dime bars, called Knäck, but going that long is risky and hard.
I'm not sure if you can count this as Swedish cosine, but all examples I've seen are Swedish.