Step 1:

• Preheat your oven to 350°F (175°C).
• Line a muffin pan with cupcake liners and lightly spray them with cooking spray.

Step 2:

• In a large bowl, whisk together flour, cocoa powder, baking soda, baking powder, and salt. Set aside.
• In a separate medium bowl, whisk eggs and sugar until pale and foamy. Add yogurt, oil, and vanilla, and whisk until combined.
• Slowly pour boiling water into the egg mixture while whisking continuously.

Step 3:

• Combine wet and dry ingredients, stirring until well mixed and no dry bits remain.

Step 4:

• Scoop the batter into the cupcake liners using a 1/2-cup measuring cup.

Step 5:

• Bake for 20-25 minutes until a toothpick comes out with a few moist crumbs.

Step 6:

• Let cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.