Preheat your oven to 350°F (175°C).

In a large mixing bowl, combine the dough ingredients: melted butter, sugar, and eggs, mixing until a soft, non-sticky dough forms.

Gently fold fresh blueberries into the prepared dough without mashing them.

Tear small pieces of the dough, roll them in a mixture of cinnamon and sugar, and layer in a greased bundt pan.

Bake for 30-35 minutes, checking for a golden brown top and a clean skewer insert.

Let cool in the pan for about 10 minutes before inverting onto a serving plate.