Step 1

Preheat the oven to 400 degrees Fahrenheit. Grease a 12 cup muffin tin, and set aside.

Step 2

To a high speed blender, add the can of drained, and rinsed black beans, whole eggs, egg yolks, Greek yogurt, melted coconut oil, cinnamon, instant espresso powder (if using), baking powder, baking soda, kosher salt, granulated sugar  (or coconut sugar), cocoa powder, and vanilla extract – blend on medium-high speed, stopping to scrape down the sides once or twice, until the batter is smooth. Note: if you’re not using a high speed blender, then you might need to stop the blender a few times to give everything a really good stir, it may take a few minutes to get it there, but it will blend eventually. Just make sure the batter is nice and smooth.

Step 3

Use a spatula to stir the 3/4 cup of the chocolate chips into the batter (reserving 1/4 cup of them for topping). Even though it adds an extra dish to wash, I do like to transfer the batter into a large mixing bowl, and mix the chocolate chips in there. I found too many of the chocolate chips got left behind under the blade. However, either method works fine.

Step 4

Measure out 1/4 cup of the batter into each muffin cavity of the muffin pan. I like to use a spring loaded ice cream scoop to make it extra easy. Top the muffins with a few of the reserved 1/4 cup of chocolate chips.

Step 5

Bake the muffins for 9 minutes at 400 degrees Fahrenheit. Reduce the oven to 325 degrees Fahrenheit and bake another 8 to 9 minutes, or until a skewer comes out clean when inserted into the center of the muffins.

Step 6

Allow the muffins to cool for at least 20 minutes before gently removing them from the pan.

Step 7

The muffins are great served slightly warm, with the chocolate chips still melty. Or, if saving them for later allow them to cool completely, and for the chocolate chips to solidify and completely cool, on a wire cooling rack.

Step 8

To store the muffins, make sure they are completely cooled, and store them in an air tight container that has been lined with paper towels on the bottom, and on top of the muffins to soak up any excess moisture. Store at room temperature for 4 to 5 days.