The phrase "strong coffee" refers to coffee that has a bold and intense flavor. It means the coffee has a higher concentration of caffeine and a more robust taste.
Whilst I sometimes crave the combination of strong coffee with a little sweetness, I try to not add the white stuff and neither should you. (eluxemagazine.com)
Then I'd totally recommend making this dessert then, it goes perfectly with strong coffee, tastes so good! (bake-no-fake.com)
If brewing strong coffee, use double the amount of grounds you would in your regular coffee. (swankyrecipes.com)