Step 1

Preheat oven to 375 degrees. In a medium bowl, add blueberries, orange juice, and sugar, and stir to combine, then pour into a 9-inch square or round baking dish.

Step 2

In a small bowl, whisk together flour, baking powder, and salt. In a medium bowl, cream butter and sugar together until pale and fluffy, about 5 minutes.

Step 3

Beat in egg and vanilla extract. Working in batches, add 1/3 of the flour mixture at a time, beating well after each addition.

Step 4

Drop rounded tablespoons of batter over the blueberry mixture (I like to use the OXO small scoop, a #70 portion scoop, heaped).

Step 5

Bake until the topping is golden brown and the filling is hot and bubbly, about 35 to 40 minutes. Cool 10 minutes before serving. Serve with ice cream if desired.