Unroll biscuits and cut into sixths.
Pour 1/4 c. granulated sugar into gallon-size Ziploc bag, add cut biscuits, and shake to coat.
Melt butter, brown sugar and vanilla over low heat. Pour into a greased 12-cup bundt pan.
Add chopped pineapple, spreading evenly over melted butter & brown sugar mixture.
Top with sugar-coated biscuit dough.
Bake at 350 degrees for 40-50 min or until golden brown.
Remove bread from oven and cool 5-10 minutes before inverting onto a serving plate.