In a large bowl, whisk the flour, cocoa powder, sugar, baking powder, and salt together.
1¼ cups all-purpose flour, ¼ cup unsweetened cocoa powder, ¼ cup granulated sugar, 1½ teaspoons baking powder, ¼ teaspoon kosher salt
In a medium bowl, whisk the milk, eggs, vegetable oil, and vanilla extract together.
1 cup milk, 2 large eggs, 2 tablespoons vegetable oil, ½ teaspoon pure vanilla extract
Pour the wet ingredients into the dry ingredients and use a spatula to mix until the batter is just combined. Gently fold in the chocolate chips.
½ cup semisweet chocolate chips
Heat a large skillet or griddle over medium heat. Grease the pan with nonstick spray.
Pour the batter into the skillet using a ¼-cup measuring cup. Cook for about 1 minute on each side, until browned. Transfer the cooked pancakes to a plate and wrap with foil. Repeat with the remaining batter.
Make the chocolate sauce. Place the chocolate chips in a microwave-safe bowl. Microwave the chocolate chips in 30-second increments, stirring in between each, until completely melted.
1¼ cups semisweet chocolate chips
Pour the heavy cream into the melted chocolate and whisk until the sauce is silky and smooth.
½ cup heavy cream
Serve the pancakes with chocolate sauce and a sprinkle of chocolate chips.