Combine cocoa and sugar in a small cup until well mixed.

Add yoghurt to the cocoa-sugar mixture and stir until smooth and evenly colored.

Peel the banana, halve it lengthwise, and slice into finger-thick pieces.

If it's cold, microwave the banana slices for one minute on full power.

If it's cold, warm the tortilla on an electric cooker over low heat for 2-3 minutes per side.

Lay the warm tortilla flat on a plate.

Place banana slices in the center of the tortilla.

Spoon the chocolate yoghurt mixture over the banana slices.

Ensure the filling is within one inch of the edge you plan to bite into.

Fold one side of the tortilla over the filling, tuck the bottom in, and fold the other side over to wrap it.

Enjoy immediately.