They are amazingly quick and easy to make and I was pleased by the resulting soft chocolatey cookie. While my husband said he couldn't taste the avocado, for me, the first bite of each cookie (I've sampled a few) tastes like avocado, which could just be because when I pick one up I think 'this is an avocado cookie' and after the first bite I don't notice the avocado flavor anymore.
So, here's what I did
Use a mixer to combine
1 very ripe avocado
1/2 cup coconut sugar
1/2 cup cocoa powder
1/2 teaspoon baking soda
once the batter is smooth mix in by hand
1/2 cup chocolate chips - I used large milk chocolate chips
Put dollops of batter on a lined cookie sheet. They don't spread so you may want to push them down a little with the back of your spoon to shape them. Then bake at 350 for 10 minutes.
Store in the fridge