The first is espresso powder. After a little reading, I surmised that this is not essential to the recipe working, but I wanted to find it. It was not in my local supermarket. A quick google search landed me at Williams-Sonoma.
[espresso powder. williams-sonoma. $10.95]
And the most important item are those insanely cute 4 oz jars. I could not find them anywhere. I searched supermarkets, Target, hardware stores. Not one store had this petite size.
The one-stop shop, amazon.com, had them available so I quickly added them to my cart. $8.99 for a dozen of these darlings! They will arrive next week. I plan to make the mousse for my husband on his birthday. [It just happens to be gluten free!]
Life is sweet, indulge in dessert.