What nut-flavored cocoa spread is listed as a common sweet crêpe filling?

The common nut-flavored cocoa filling listed for sweet crêpes is hazelnut cocoa spread.

Sweet crêpes are usually made from wheat-flour batter, with sugar sometimes included in the mixture. Once cooked, the thin pancakes can be filled with spreads, preserves, syrup, fruit, cream, or custard. Hazelnut cocoa spread is especially popular because its smooth texture is easy to spread across a warm crêpe.

The answer describes a category rather than a single brand. Nutella is a famous example of hazelnut cocoa spread, but the generic food name is the fair answer here. It should not be confused with almond butter or pistachio cream, which are also possible modern fillings but are not the standard example named in the reference.

Crêpes differ from thicker leavened pancakes because their liquid batter cooks into a broad, flexible layer. That makes them well suited to folding around sweet fillings, particularly in cafés and street-food stalls.