Melt the butter in the microwave or on the stove. Your butter should be runny, warm, not hot, and can contain chunks of soft butter.
Add brown sugar to the butter and whisk them together until creamy consistency.
Break the eggs into a bowl with a rum aroma. Pour them into the creamy mixture. If you want your cookies with extra caramel, add 8 tbsps of cold salted caramel. Mix well.
Add flour with baking soda and baking powder. Mix until the flour disappears.
Add chocolate chips. Put the cookie mixture into the fridge for at least 40 minutes. You can totally skip this step but your cookies will be flatter, if that's what you want.
Scoop the cookie dough on the baking paper and bake at 180°C for 8-10 minutes. I baked mine for 8 and then I let them cool on the baking sheet for extra 5 minutes. They are still baking even when they're out of the oven.
The crucial step is - to sprinkle some sea salt on top of them when you take them out of the oven!
You can add salted caramel while they're still hot but for nicer look, pour salted caramel on top of them once they're cool.