Chocolate raspberry mousse
It's probably no surprise that the French were the first to create mousse. Some articles I've read credit the post-Impressionist painter Henri Toulouse-Lautrec with its invention in the late 19th century. In French, 'mousse' means 'froth' or 'foam'. Chocolate is the most popular flavour of mousse for both young and old alike.
Let's talk chocolate! There are 8 main types of chocolate: Baking; Bittersweet; Semisweet; Sweet; Milk; White; Cocoa powder; Couverture and Cocoa nibs. Each has its uses. A great source for which to use in any situation is https://www.allrecipes.com/article/how-to-choose-chocolate/. For our purposes today, the best form of chocolate to use is couverture or bittersweet. Couverture has at least 32% cocoa butter which makes it glossy and flows well when melted and tempered. Bittersweet has a high level of cocoa solids -70% of which is made up of cocoa butter and solids. These 2 will give you the best results. The level of cocoa butter is important for your end results. Cocoa butter:* suspends and lubricates the sugar particles and lowers the viscosity of the melted chocolate.
* sets to a brittle consistency providing the "snap" at room temperature.
* contracts when it sets (this makes removing it from moulds easier)
* provides the "melt in your mouth" texture
Chocolate is prone to seizing or tightening up. This can happen for 3 reasons:
1. You have over heated it and burnt it (This often happens when melting in the microwave, or if the bowl used to melt the chocolate is resting in the water and the temperature then become uneven). If this happens there is no "saving" and you need to throw it out and start again.
2. The chocolate has come into contact with a little water.
3. When not enough liquid has been added. The higher cacao percentage, the more liquid is required for sauces and ganaches and other chocolate mixtures that involve liquid. Stirring in a little more of the same liquid, or even water, will loosen the mixture and restore its gloss and fluidity.
https://food52.com/blog/14453-what-to-do-when-your-chocolate-seizes
When making this recipe, if a little steam gets into the chocolate as you are melting it may seize up. Don't despair just keep going - with the addition of the egg mixture and the raspberry puree, it will still come together.
Temperature is all important when cooking with chocolate. It is important for all ingredients to be the same temperature when brought together. In the YouTube video, you will notice I place the bowl with the melted chocolate on the saucepan that contains the raspberry purée. This helps to gentle cool both ingredients. I also take the eggs off the heat and stir a little to release the heat before adding the chocolate and raspberry. It is also important to let the chocolate mixture continue to cool down towards room temperature whilst whipping the cream. If the chocolate is too hot, the cream will just melt and the mousse will be heavy in texture.
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