Coffee Mousseline filling added to bottom half of cake by Cake and Cookie recipes on April 13th, 2012 · without comments Bottom half of a Coffee and Walnut cake with the Coffee Mousseline filling added.Share: Share on Facebook Share on Twitter Share on Google+ Share on LinkedIn™ Share on Pinterest Coffee and Walnut Cake Recipe Leave a Reply Click here to cancel reply. Name (required) Mail (will not be published) (required) Website