Line a 20 cm (8") square baking pan with parchment paper.
Place avocados in blender container and purée until smooth.
Melt the chocolate in the microwave on low power.
Add the melted chocolate to the avocado purée and mix until smooth.
Add the almond butter and mix again.
Pour into dish and level surface. Sprinkle with fleur de sel or walnuts.
Refrigerate for a minimum of 2 hours, until fudge is firm. Cut into 16 squares.
Notes
Low FODMAP substitution:
Opt for dark chocolate with 85-100% cocoa content
Note: Considering a total mass of more or less 272g of avocado, each square contains 17g of avocado, which is considered low in FODMAPs. The average tolerance is up to 60g of avocado (Monash University FODMAP Diet)Recipe by Catherine Michaud, Nutritionist-Dietitian and Special Projects Integrator