In a large bowl, mix almond / peanut butter, erythritol, cocoa, PB2 / protein, eggs, butter, water, vanilla extract, and baking soda. Using a mixer, mix the ingredients until smooth. It should be a pretty thick dough. Add the chocolate chips.
Divide the dough evenly into 18 mini-cupcake tins and place in the oven preheated to 180 ° C for 11 minutes, then remove and cool.