Thought I should try this before the Difford's recipe for comparison purposes. No Mr. Black or NOLA at my local LCBO, so I opted for Tia Maria, having never had it before. Glad I didn't use Kahlua, because this still came out pretty sweet and vanilla-tasting. Was surprised by how well everything came together though, and the espresso still really shined, despite the drink being overall slightly too sweet. I can see why Difford adjusted the recipe.