Preheat oven to 350 F.
Make your cake batter: Using an electrical whisk, whisk the eggs, vanilla extract and sugar for 2-3 minutes until the mixture doubles up and becomes light in color and fluffy.
Wet ingredients: add in the milk and oil and whisk again for another minute.
Dry ingredients: Add in the flour, baking powder and dash of salt. Whisk for a couple minutes until well incorporated. Turn off them mixer and allow the cake batter to rest for about 5 minutes.
Add blueberries: Coat the blueberries with some flour. If the blueberries are dry, spray a little with some baking spray and add in the flour. this should help them bond with the flour. Fold in 90% of your blueberries into the cake batter.
Add the batter to the Bundt pan: Spray the Bundt pan with some baking spray and pour in the batter and top with the remainder of your blueberries.
Bake: Place you Bundt pan in the oven on the middle rack at 350 F degrees for 50 minutes. Typically you would want to check the cake batter at around 45 minutes with a wooden skewer to make sure it's not cooked already. Some ovens are different than others.
Allow to cool: Once the cake has cooled down, transfer to a serving dish and enjoy!