01 - In a large mixing bowl, combine the warm water, sugar, and instant yeast. Let the mixture rest for approximately 5 minutes until it becomes frothy and bubbly on the surface.
02 - Add the all-purpose flour, salt, and softened butter to the yeast mixture. Stir until a shaggy dough comes together, then turn out onto a lightly floured surface.
03 - Knead the dough by hand for 7 to 8 minutes, or 5 minutes using a stand mixer fitted with a dough hook, until the dough is smooth, elastic, and springs back when gently pressed.
04 - Transfer the dough to a lightly greased bowl, cover tightly with plastic wrap or a clean kitchen towel, and place in a warm, draft-free spot until the dough has doubled in size, about 1 hour.
05 - Preheat the oven to 400°F (200°C). Line a large baking sheet with parchment paper and set aside.
06 - Gently punch down the risen dough to release air bubbles. Divide it into 12 equal portions and roll each piece into a slender breadstick approximately 7 to 8 inches long. Arrange them on the prepared baking sheet, spacing about 1½ inches apart.
07 - Loosely drape a clean kitchen towel over the shaped breadsticks and allow them to puff and rise for 20 to 30 minutes in a warm area.
08 - Bake the breadsticks on the center rack for 12 to 15 minutes, until the tops are lightly golden and the bottoms sound hollow when tapped.
09 - While the breadsticks bake, whisk together the melted butter, minced garlic, salt, and chopped parsley in a small bowl. As soon as the breadsticks emerge from the oven, brush them generously on all sides with the garlic butter. Serve warm.