I've been refining my smoothie recipe, and here's the best so far:
4 oz water
4 oz 2% milk
3 tbs Kirkland organic peanut butter
1 scoop GNC chocolate-caramel 100% whey powder
1 tsp powdered psyllium husks (not Metamucil)
2 Kirkland frozen strawberries
I've now tried the following protein powders: gnc chocolate, gnc chocolate-caramel, EAS vanilla, Designer strawberry, Designer vanilla. The chocolate-caramel is by far the best.
I use the Kirkland organic peanut butter not because it is organic, but because it doesn't have added sugar. I've been a Skippy superchunk fan for 30 years, but this organic stuff tastes much better. Once you switch you won't go back, even with the bother of needing to keep it in the fridge.
For the unflavored Metamucil, the first ingredient is sugar -- that's why I've switched to the pure psyllium husks (about the same price).