To prepare the cupcakes, preheat the oven to 400°F/205°C. Grease a 6-c. muffin pan with shortening.
In a large mixing bowl, sift together flour, baking powder and salt.
In a separate bowl, combine egg, cream, sugar, melted butter and vanilla.
Pour the wet ingredients into the dry ingredients and mix until just combined. Gently fold in the blueberries.
Divide the batter equally among the muffin cups and bake for 12 - 15 minutes or until inserted toothpick comes out clean.
Remove from the oven and cool on a wire rack for a few minutes before removing the muffins from the pan.