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set aside 2 large eggs and 1 egg yolk
set aside 3/4 cup sour cream
whisk 1 teaspoon instant coffee, 1/4 cup cocoa powder, and 1/2 cup hot water into a small bowl
whisk 1 2/3 cup flour, 1/2 cup cocoa powder, 2 teaspoon baking powder, 1/2 teaspoon baking soda, and 1 teaspoon salt into a medium bowl
whisk 1 cup sugar, 1/3 cup vegetable oil, the eggs and egg yolk, and ~3 teaspoon vanilla extract into a large bowl
mix in the sour cream and the cocoa powder aand hot water mixture
slowly stir the dry ingredients (medium bowl) into the wet ingredients (large bowl) until everything's just been combined
fold in ~1 cup chocolate chips
preheat the oven to 375°f
evenly transfer and distribute the muffin batter mixture to a muffin tin lined with cupcake wrappers
top with chocolate chips
bake for ~18 minutes or until a toothpick stabbed into the middle comes out clean