This is not a thick smoothie, it’s easily drinkable (you don’t need a spoon), like a milkshake. If you want a thicker one add less milk and/or juice.

Too avoid too much dairy in my breakfast (and a possible stomach ache), I prefer a mixture of yogurt and rice milk or other non-dairy milk. You can of course use regular milk instead.

I use store-bought beet juice. The store in my neighborhood doesn’t always have beets, so getting juice is just easier for me. I only buy 100% beet juice without anything added to it (like other fruits or sugar).
If you have beets at home, you can use those instead. Peal one small beet, cut it into chunks and add to your smoothie.

If you don’t like bananas, an apple is a great substitute.

Medjol dates are a great addition to make the smoothie sweeter.