Preheat oven to 400°F (204°C). Line a regular-size 12-cup muffin tin with liners.
In a larger mixing bowl, mix together all the ingredients except the berries, just until combined.
Gently fold in the blueberries (3/4 cup).
Divide the batter among the prepared muffin tins.
Bake in preheated oven for 7 minutes, rotate the pans, and continue to bake for 6-8 minutes, or until a toothpick inserted in the center of the muffins comes out with a few moist crumbs.
Notes
Muffin tin tips – Paper or foil liners (or the reusable silicone option) are a no-brainer when making muffins, but I do occasionally still use a non-stick spray to lightly coat the flat part of the tin around the muffin holes.
This provides a little extra protection if your batter spills out of the sides when they’re baking.
Another tip is to use either a gravy ladle or an ice cream scoop to get a consistent amount of the batter into the muffins. The muffins will look more uniform, of course, but they’ll also cook more evenly.
Best Way To Measure Bisquick: You might not have given much thought to how you measure Bisquick but it can make a big difference in the ultimate texture of your Lemon Poppy Seed Muffins.
Do NOT use the ‘dig method’ where you dig a cup of Bisquick out of the container. This can result in a significant amount of extra Bisquick. Instead, fluff it in the container a bit and use a spoon to scoop it out into your measuring cup until it is heaping.
Then level it off with the back of a straight edge knife so it’s perfectly even with the top.