If you're someone who wrestles with the ultimate dessert decision at McDonald's—Oreo or M&M McFlurry?—I have the answer for you: Pralines & Cream. The newest flavor (a limited-time, seasonal offering) features candied pecan pieces and hot caramel topping blended with vanilla soft serve. It's available in two sizes: snack ($1.99) and regular ($2.79).
Blending the warm caramel topping with the soft serve gives the McFlurry a different, and all-together delicious, texture. The topping doesn't stay warm once it's mixed in, but it does affect the surrounding soft serve, making most of the ice cream a few noticeable degrees more melty.
The sweet caramel combined with the pecan pralines (which have a similar flavor profile: sweet and buttery) may seem like an overkill, but it absolutely works. In fact, it works so well that I'm deeming this the next-level caramel sundae. Two of the three ingredients are the same (soft serve and warm caramel topping), but by blending it up and adding those small bits of crunchy, candy-coated pecan pieces (instead of the standard-issue peanuts, which I've always found strangely waxy), McDonald's has created an outstanding new McFlurry flavor. You should try it.