Preheat Oven: Preheat oven to 375°F (190°C) and line a muffin tin with paper liners.

Mix Dry Ingredients: In a bowl, whisk together flour, baking powder, baking soda, and salt.

Prepare Cocoa Mixture: In a separate bowl, whisk cocoa powder with hot water until smooth.

Combine Wet Ingredients: Add sugar, oil, eggs, vanilla, and sour cream to the cocoa mixture. Mix well.

Combine Wet and Dry Ingredients: Gradually fold the dry ingredients into the wet mixture until just combined.

Add Chocolate Chips: Gently stir in the semi-sweet chocolate chips.

Fill Muffin Cups: Pour batter into muffin cups almost to the top.

Bake: Bake for 18–20 minutes, or until a toothpick inserted in the center comes out with moist crumbs.

Cool and Serve: Let muffins cool slightly before serving. Enjoy!

Serving and Storage Tips: