Preheat the oven to 350 degrees F, grease a 9x5 loaf pan with cooking spray/oil then coat with flour and discard the excess and set the pan aside.
Rinse the blueberry, pat dry, and coat with flour.
Whisk the dry ingredients; flour, sugar, baking soda, baking powder, salt, zest.
In another bowl, mix all the wet ingredients; oil, eggs, orange, vanilla extract.
Pour the wet ingredients into the dry ingredients until well combined. Gently fold in the coated blueberry into the batter and pour into the prepared pan.
Use a spatula to level the batter and bake for 50-60 minutes or until the golden brown and you insert a toothpick into the center and comes out clean.
Cool it down for about 10 minutes, turn onto a cooling rack and allow to cool down completely.
Mix the glaze together, poke a hole on the cake with a toothpick and drizzle the glaze.
If you want more glaze to whisk one cup of confectioners’ sugar, ¼ cup orange juice, a dash of vanilla extract, if the constituency is too thick add a splash of milk until you get the desired consistency.
Let it rests for a few minutes slice and serve.
You can serve with tea, juice, milk, or coffee.