Cocoa powder (Recipe: cocoa-cumin-allspice rub)

Sometimes I uncover an item in my pantry that's a bit of mystery. I know I should have it. In fact, I'm never without it. I just don't know why.
Cocoa powder is the mystery du jour.
What, exactly, is cocoa powder? What makes some of it Dutch-processed? Is natural cocoa powder better, or just different?
Here's what I've learned.
Unsweetened cocoa powder results from the pressing of chocolate liquor to remove most of the cocoa butter. The remaining cocoa solids are processed to make a fine powder. There are two types: natural, and Dutch-processed.
In 1778, the Dutch brought cacao from the Philippines to Sumatra, where they established a propagation facility that enabled major production in the region. In 1828, Conrad van Hooten, a Dutch chemist, patented a technique for pressing most of the fat from roasted and crushed cocoa beans, improving the digestibility of the resulting powder. The addition of alkaline salts neutralized the acids in the cocoa, making it more easily soluble in liquids. This "Dutch cocoa", as it came to be called, has a mild flavor, and must be used with baking powder or other acidic ingredients.
Natural unsweetened cocoa powder is more intense in color and flavor; when used in a recipe that calls for baking soda (an alkali), it creates a leavening agent.
Though it's always best to use the type of cocoa powder specified in a recipe, in a pinch (ha ha) you can substitute one kind of cocoa powder for another:
- For 3 Tbsp Dutch-processed cocoa, substitute 3 Tbsp natural cocoa powder plus 1/8 tsp baking soda.
- For 3 Tbsp natural cocoa, substitute 3 Tbsp Dutch-processed cocoa plus 1/8 tsp cream of tartar or 1/8 tsp lemon juice or vinegar.
(At the moment, I happen to have Droste, a Dutch-processed brand, in the pantry. Other popular brands: Valrhona and Lindt. Some natural cocoa powder brands: Ghirardelli, Scharffen Berger, and good old Hershey's.)
We always think of cocoa as a sweetener, but unsweetened cocoa is an ancient food that features in the cuisines of Brazil, Mexico (think molé), and other countries in the cacao-growing bands a few degrees north and south of the Equator.
COCOA-CUMIN-ALLSPICE RUB
The surprise hit of the #1 Cooking Group's recent cooking session on dry rubs and wet mops. We rubbed this on venison tenderloins and cooked them on the grill. Oh, baby! Adapted from Cooks Illustrated. Makes about 1/3 cup.
1 Tbsp unsweetened cocoa
4 tsp ground cumin
2 tsp ground allspice
4 tsp black peppercorns
2 tsp kosher salt
Grind all ingredients in a dedicated spice grinder (don't use your coffee mill) or mortar until no whole peppercorns remain.














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