Guinness Chocolate Cake

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Ingredients

two 11.2–12-ounce (330–355ml each, so 660–710ml total) bottles of Guinness Draught Stout beer
1 and 3/4 cups (219g) all-purpose flour (spooned & leveled)
3/4 cup (62g) unsweetened natural cocoa powder
1 and 3/4 cups (350g) granulated sugar
2 teaspoons baking soda
1 teaspoon baking powder
1 teaspoon salt
2 teaspoons espresso powder (optional)
1/2 cup (120ml) vegetable oil (or canola oil or melted coconut oil)
3/4 cup (180g) full-fat sour cream, at room temperature
2 large eggs, at room temperature
2 teaspoons pure vanilla extract
1/2 cup (120ml) buttermilk*, at room temperature
8 ounces (226g) full-fat brick cream cheese,  softened to room temperature*
1/2 cup (8 Tbsp; 113g) unsalted butter, softened to room temperature
2 and 1/2 cups (300g) confectioners’ sugar
1/2 cup (41g) unsweetened natural or dutch-process cocoa powder
3 Tablespoons (45g/ml) reduced Guinness, from step 1
pinch salt
optional: gold sprinkles for garnish

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