Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
Cook grated beetroot in boiling water for 10-15 minutes until soft, then drain and blend into a smooth paste.
In a large bowl, mix whole wheat flour, brown sugar, and baking powder.
In a separate bowl, whisk together egg, butter, vanilla essence, and beetroot paste until well combined.
Add the wet ingredients to the dry ingredients and mix until a soft dough forms.
Roll dough into 1-inch balls using your hands.
Roll each ball in powdered sugar, coating generously.
Roll again in powdered sugar for a double coat to guarantee better crinkles.
Place cookies 2 inches apart on the prepared baking sheet.
Bake for 10-12 minutes until edges are set and tops are cracked.
Cool on baking sheet for 5 minutes before transferring to a wire rack.