In a large saucepan, add the 1/4 cup butter, 1/2 cup light brown sugar, 1/4 cup granulated sugar, 1/2 cup light corn syrup, 2 large eggs, 2 teaspoons vanilla bean paste, and 3/4 cup chopped pecans. Stir until completely combined.
Place over medium heat stirring constantly until it comes to a boil. Let boil for 4 minutes until it becomes thick, stirring constantly. When running the wooden spoon on the bottom of the pan, the filling will spread apart and leave a path briefly.
Remove from the heat and pour into a bowl to cool.
Topping
Preheat the oven to 350 degrees F. Grease a 9-inch bundt pan or tube pan with nonstick cooking spray.
In a small saucepan, add in the 1/2 cup butter and 1 cup light brown sugar. Heat on medium heat until the sauce is smooth, stirring often. It will take about 10 minutes.
Pour the hot topping into the prepared bundt pan.
Sprinkle the 1/2 cup chopped pecans on top of the topping.
Monkey Bread
In a shallow bowl, add the 3/4 cup granulated sugar, and 1 1/2 tablespoons ground cinnamon. Stir until the cinnamon and sugar are combined.
Unwrap the4 (7.5 ounce tubes) store-bought biscuits. Flatten the biscuits in your palm. Cup your hand and stretch the biscuit so it can hold 1 to 1 1/2 teaspoons of cooled pecan pie filling.
Add 1 to 1 1/2 teaspoons of cooled pecan pie filling. Pinch the biscuits together to seal the filling in.
Roll the biscuits into the cinnamon sugar until they are completely covered. Place into the bundt pan on top of the brown sugar mixture. Continue to roll all the pieces into the cinnamon sugar and layer them in the bundt pan.
Place the pan in the preheated oven for about an hour. If the biscuits on the top are getting too dark, make a tin foil tent by ripping off a large piece if tin foil and folding it in half. Place it on top of the biscuits to prevent further browning. Pull the biscuits from the center of the bundt. I would recommend using a fork and digging down a couple of layers if you're unsure whether the monkey bread is done. If the biscuits look doughy, bake longer.
Once the monkey bread is baked let it cool for 10 minutes. Run a knife around the outside of the pan and the center. Place the serving plate inverted on the bundt pan. Flip the pan upside down so the bread is sitting on the plate. Slowly pull the pan off the bread. The brown sugar mixture will drop down the sides and coat the cake.
Notes
Storage: Store covered or in an airtight cake container at room temperature for up to 5 days.