1Preheat the oven to 375F.
2In a large bowl, stir or beat together the eggs, sugars, oil or melted butter and vanilla until well-blended. In a small bowl, stir together the flour, baking powder and salt.
3Add about a third of the dry ingredients to the sugar mixture and stir by hand just until combined; add half the milk in the same manner, and then the rest of the flour/milk/flour. Gently stir in the berries with the last addition of flour.
4Divide the batter between 12 greased or paper-lined muffin cups and bake for 20-25 minutes, until golden and springy to the touch. Makes 1 dozen muffins.