Preheat your oven to 350°F and grease your 9x5 loaf pan. Then, line your loaf pan with a long strip of parchment to make it easy to remove after baking.
Add flour, baking powder, and salt into a medium bowl and whisk until all ingredients are combined. Set aside.
1 ⅔ Cups All-Purpose Flour , 1 Tablespoon Baking Powder, 1 teaspoon Sea Salt
In a separate bowl, whisk the ricotta vigorously until completely smooth - this should take about one full minute.
1 ⅔ Cups Whole Milk Ricotta
Place the butter, sugar and lemon zest into the bowl of your mixer and beat on medium speed for 3 minutes. Then, add the vanilla and eggs one at a time stopping between each addition to scrape down the sides of the bowl.
¾ Cup Unsalted Butter, 1 ½ Cups Granulated Sugar , 1 Lemon's worth of zest, 3 Eggs, 2 teaspoon Vanilla Extract
Add the ricotta and mix until combined. Then add the dry ingredients and mix until everything looks homogenous.
Toss blueberries in 2 Tablespoons of flour. This ensures that they don't sink to the bottom of the pound cake while baking and fold them gently into the batter.
1 Tablespoon All-Purpose Flour , 1½ Cups Blueberries
Scoop the mixture into your 9 x 5 greased loaf pan and smooth out the top with an offset spatula or a spoon. Then, bake until the center of your loaf reaches 200° F on your thermometer before removing it from the oven. This should take about 65 to 75 minutes at minimum. Unfortunately, the toothpick test is not the best way to ensure that this pound cake is fully baked - checking for doneness with a thermometer will ensure you have a perfect bake!
Allow your pound cake to cool in the pan for 15 minutes before removing and placing it on a cooling rack to cool completely.