My fave (and my 5 year old's fave):
1 frozen banana
3 tbsp PB powder (we use the stuff from Costco)
1 container Chobani Simply 100 vanilla greek yogurt
1/2 tbsp ground flax
1/2 tbsp milled chia seeds
1/4 cup frozen spinach
cashew milk to help it blend

My 7 year old's fave:
1 raw banana
1 container Chobani Simply 100 strawberry greek yogurt
1/2 cup frozen blueberries
1 cup frozen strawberries
1/2 tbsp ground flax
1/2 tbsp milled chia seeds
1/4 cup frozen spinach
cashew milk to help it blend

You could easily sub protein powder for the yogurt. Banana makes it creamy and using frozen fruit eliminates the need for ice.

My Favorite is
1/2 cup Strawberries
1/2 Cup of Blue Berries
1/2 Cup of Rasberries
1/2 Cup of Black berries
1 Scoop of Whey Protien (Vanilla)
I also add fiber (2 tsp)
Skim milk to help blend
All Fruit is frozen. I vary the fruit for different flavors when I want a change.

My new favorite is :
2 C Unsweetened vanilla almond milk
2 Scoops GNC Total Lean Vanilla Protein Powder
2 Packets Splenda
and 8 double strength coffee ice cubes.
Tastes just like a coffee coolata from Dunkin donuts!
260 Calories, 19 carbs, 8 fat, 27 protein, 9 fiber and 3 sugar.

I get my coffee AND my breakfast all in one and stay full until lunch usually.

My fave:
200 mL crushed ice
1/3 c almond milk
heaping handful of kale
1/2 c pineapple
1/3 of a mango
2-3 strawberries
3 scoops Greek yogurt

Put it in a bowl with granola and diced mango & strawberries!! I find it's better with more pineapple, but different amounts of fruit make it totally different!