I've put together a baking blend but it does have some almond flour in it. As
@Brunneria said, the ingredients are not cheap but once they are in the baking cupboard they do last a while. Blend I use currently is
Baking Mix THM version 2
Servings: 5 cups
Ingredients
2 cups oat fiber (NOT oat flour or oat bran)
1 cup coconut flour
1 cup golden flax meal
¾ cup collagen
½ cup almond flour
1 tablespoon glucomannan or xanthan gum
Steps
Sift all ingredients then blend thoroughly together.
Store in an airtight container at room temperature.
Notes
Use 1:1 in place of THM's Baking Blend.
If I'm baking something that needs 'rise' then I add baking powder to it and another trick is to separate the eggs, whisk the whites to stiff peaks and fold them in at the end.
As for sweeteners, I'm a big fan of Monkfruit granulated sweetener. No nasty aftertaste and it is great for baking.
If you really can't stand Almond flour you could probably up the coconut flour and golden flax meal in the mix to sub for the half cup of almond flour.