Mix in the eggs, one at a time. Stir in the mint extract. Fold in the flour until fully combined, then fold in the chocolate chips. Gently fold in the strawberries.
Pour the batter into the prepared pan, and spread out evenly. Top with a few extra strawberry halves if desired, then bake for 35 - 40 minutes, or until a toothpick inserted into the centre comes out almost clean with a few moist crumbs. Allow to cool completely in the pan on a wire rack before cutting into squares.
Brownies stay fresh, stored in an airtight container, in the fridge for up to 1 week. They also freeze well for up to 3 months. Thaw overnight in the fridge before serving.
The calories are an estimate only.