MASHED POTATOES WITH GARLIC SCAPES

2 1/2 lbs. russet potatoes, peeled and cut into 1" pieces. 
2 Tablespoons butter
1-2 Tbsp, olive oil 
1/4 cup finely chopped scapes
1/4 cup hot milk (or more)

Cook potatoes until very tender. Drain and return to pot. Over medium high heat, melt butter with olive oil in a small skillet. Add scapes and saute about 5 minutes. Add to potatoes and mash. Gradually add milk while stirring. Season with salt and pepper.