Making Chocolate Spinach Muffins is a breeze when you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and line a muffin tin with paper liners or grease it to prevent sticking.

2. Blend Spinach: In a blender, combine the chopped spinach with the milk. Blend until smooth and set aside.

3. Mix Dry Ingredients: In a large bowl, whisk together the flour, cocoa powder, sugar, baking powder, baking soda, and salt until well combined.

4. Combine Wet Ingredients: In another bowl, mix the spinach-milk blend, eggs, and vegetable oil until thoroughly combined.

5. Combine Mixtures: Gradually add the wet ingredients to the dry mixture. Stir gently until just combined; be careful not to overmix.

6. Add Chocolate Chips: If desired, fold in the semi-sweet chocolate chips for an extra chocolatey experience.

7. Fill Muffin Cups: Pour the batter evenly into the muffin cups, filling each about two-thirds full.

8. Bake: Place the muffin tin in the preheated oven and bake for 20-25 minutes, or until a toothpick inserted in the center comes out clean.

9. Cool: Once baked, remove the muffins from the oven and allow them to cool in the tin for about 10 minutes. Then transfer them to a wire rack to cool completely.

10. Enjoy: Your delicious Chocolate Spinach Muffins are now ready to be enjoyed warm or at room temperature!