Preheat oven to 350 degrees and prepare a baking sheet with parchment paper or silicone mat.

In a large bowl mix the almond flour, cocoa, baking powder and baking soda. Mix until everything is perfectly well integrated.

Add maple syrup, oil and vanilla. Mix slowly, it may seem it is not integrating properly, but be patient it will come together.

When everything is well integrated add pistachios, mix and put everything on the tray.

Form a rectangle half an inch thick.

Put in the oven for 15 minutes, or until firm to the touch.

Remove from oven and let cool about 20 -25 minutes.

Turn down the temperature in the oven at 275 ° F. When cold, slice with a bread knife or a serrated knife into an inch or so pieces.

Put back on the tray and into the oven for 20-25 minutes more.

Let them cool before trying.