Start by washing the kale, spinach, and celery thoroughly under cold water to remove any debris. Set it aside to drain any excess water.

Now peel and chop the cucumber into bite size pieces. You can peel and chop the apple, and pear if you desire, but the skin does have a lot of health benefits.

Depending on the power of your blender- the smoothie may not be as creamy if you leave the skin on. If you're using fresh pineapple, cut it into chunks as well.

Add all the ingredients: kale, spinach, pineapple, pear, green apple, celery, cucumber, ground flaxseed, walnuts, oat milk, and optional ice to a blender.

Blend everything up on high speed until it is smooth and creamy. If the smoothie is too thick, you can add a little more oat milk (one tablespoon at a time) until it reaches your desired consistency.

Taste your smoothie, and if you prefer a sweeter flavor, you can add a little honey or a splash of lemon juice to balance the flavors.

If you’d like a thicker smoothie, you can add a bit more frozen pineapple or another tablespoon of flaxseed.

Pour the smoothie into a glass and enjoy!