Pour 2 cups of oil into a medium sized saucepan and begin heating on medium-low heat.
Open the biscuit dough and separate. Gently stretch the biscuits into an oblong shape, as opposed to the round shape they come in.
In a small saucepan, combine butter and brown sugar. Whisk in milk and heat for about 5 minutes on medium heat, stirring often, until butter is melted and sugar is dissolved.
Remove from heat and add in corn syrup and maple extract. Add in powdered sugar 1/2 cup at a time, whisking until smooth between additions. Add 1-2 tsp more milk if necessary. Glaze will begin to harden if you leave it sitting- which is what you want! Once all powdered sugar is added, keep maple glaze warm on the stove, whisking occasionally.
Check the temperature of the oil using a digital thermometer– it needs to read 350 degrees F. Increase heat gradually if necessary.
Once oil is ready, drop bars in 2 at a time. Let cook for about 2 minutes, then turn and cook an additional 2 minutes on the other side. This process of cooking the doughnuts goes very fast, so have a paper towel covered plate ready to set the bars on when cooked. Bars should be a nice golden brown.
Let bars cool for a few minutes, then whisk the glaze to make sure it’s smooth enough to dip each bar. Dip the bar, then immediately turn glaze side up on a cooling rack.
Repeat this process until all bars are fried and glazed. They’re best eaten within an hour, but even the next morning they’re amazing!