Soak the dates for 10 minutes.
Meanwhile add the oats and yoghurt into a high speed blender. Blend for around a minute until completely smooth.
Then add the flaxseeds (and protein powder if using) and blend for a further minute. It will get a little more difficult for your blender to keep mixing and you might need to stop and scrape down the sides. Transfer the mixture into a jar.
Drain the dates and RESERVE 4 Tbsp of the soaking water.
Using a fork, mash the dates with 3 Tbsp of the water until a creamy paste forms. If the paste is too thick, add the remaining Tbsp.
Stir together the cacao powder, plant milk and maple syrup until the cacao is fully dissolved and you reach a creamy consistency.
Layer the date paste on top of the oat-yoghurt blend, top with the peanuts and pour the cacao mixture on top. Let the jar sit in the fridge overnight and enjoy in the morning!
The snickers ganache overnight oats will keep in the fridge with lid on for 2-3 days.