In a large bowl or bowl of a stand mixer fitted with dough hook attachment, combine flour, salt, honey and yeast. Add milk, melted butter, eggs and vanilla and stir until just combined. Remove dough from bowl and knead on a lightly floured surface until smooth and elastic, about 7-10 minutes (or knead on low speed in stand mixer until smooth and elastic, about 3-5 minutes). Shape dough into a ball and place in a lightly greased bowl. Cover with plastic wrap and let rise until doubled, about 1 hour.

Punch down risen dough and divide into 20 equal pieces. Roll each piece into a ball and place in lightly greased cups of a mini-muffin pan. Spritz lightly with cooking spray on top, cover loosely with plastic wrap and let rise until doubled, about 45 minutes. Meanwhile, preheat oven to 350 degrees F.

When buns have risen, remove plastic wrap and bake until golden brown, about 20-25 minutes. Remove from oven and let cool 5 minutes in muffin pan before turning out onto a plate. Meanwhile, make the glaze: Place butter and honey in a microwave-safe bowl and heat 45 seconds to melt butter. Brush glaze evenly over hot buns. Serve warm.