Preheat oven to 375°F (180°C). Line a baking sheet with parchment paper or lightly grease it.
In a large mixing bowl, cream together 3/4 cup softened butter, 1 cup dark cane sugar, and 1/4 cup light cane sugar until light and fluffy.
Add 2 eggs one at a time, mixing well after each addition. Stir in 1 teaspoon vanilla.
In a separate bowl, whisk together 3 cups freshly milled barley flour, 1/4 teaspoon baking soda, 1 teaspoon salt, and 3/4 teaspoon baking powder.
Gradually add the dry ingredients to the wet ingredients, mixing until a soft dough forms.
Fold in 1 1/2 cups chocolate chips until evenly distributed.
Scoop rounded tablespoons of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 9 to 12 minutes, or until the edges are lightly golden and centers are just set.
Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.