Preheat oven to 500 degree F. Line 12 muffin cups with paper liners.

Melt the butter in a medium size microwave-safe bowl and set it aside to cool for a few minutes.

Sift the flour, baking powder, salt, sugar and cocoa powder into a large mixing bowl.

Whisk the milk, honey, egg, yogurt and vanilla into the bowl with the melted butter. Scrape the yogurt mixture into the flour mixture and stir with a wide spatula scraper until mixed – it should be lumpy. Stir in the chocolate chips. At this point, the batter should be thick enough to kind of pile into the muffin cups. It should not be soupy or runny at all.

Divide the muffins evenly among the muffin cups filling the muffin cups as high as you can. Put the muffin cups on the center rack, close the oven and bake at 500 for about 1 ½ minutes. Reduce heat to 375 degrees F. and cook for another 18-20 minutes at 375 degrees F until a toothpick inserted in center comes out clean. Let the muffins cool.