Combine butter and corn syrup together in a small bowl.
Add 2 cups powdered sugar, food coloring, and your choice of extract and beat until well combined. Add extract 1/2 teaspoon at a time until the mixture reaches your desired flavor.
Stir in an additional cup of powdered sugar.
Turn bowl onto a cutting board sprinkled with last cup of powdered sugar.
Knead the mixture until sugar is absorbed and is completely smooth.
Shape into 1 inch balls and roll in granulated sugar.
Flatten gently with a fork.
Gently press one half of a pretzel into the top of the pumpkin using a second pretzel to stabilize. Repeat for all candies.
Tear off a small piece of green candy and shape it into a leaf. Stick it on the pretzel. Repeat for all candies.
Let candies stand, uncovered, at room temperature for 1 day.
Store in an airtight container.