Difficult to say, but adding 1kg to 5kg means I would have expected a 16% reduction in sweetness.
Interesting that you find the chocolate too sweet, I find it pretty much bang on, whereas Vanilla is more akin to Angel Delight. Still, diluting even with just more water reduces the sweetness.
I baked some whole fuel cookies yesterday.
100g rolled oats
200g whole fuel vanilla/vegan blend mix
50g coconut flour
100g erythritol
50g cocoa powder
2 tsp baking powder
pinch of salt
240g melted butter
1 tsp vanilla bean paste
2 eggs
50ml milk
Sift and mix all the dry ingredients in a bowl.
Mix all wet ingredients (I used the batter attachement on the KitchenAid), then add all the dry.
Beat until a dough forms.
Use icecream scoop to for patties (flatten with your hands as the cookies won't spread out like normal ones).
Bake at 180ºC for 15-20 minutes.
They will be pretty soft, but will firm up on cooling.
Made 24 yummy cookies!