Break the Pecan Sandies cookies into large chunks. Place the cookie pieces into the bowl of a stand mixer.
Add the softened cream cheese, 1/4 cup chopped pecans and powdered sugar. Blend this on medium speed for 3 minutes until the cookies are completely broken down and mixed into the cream cheese.
Roll the truffle mixture into 1-inch balls. Place the truffle balls on a cookie sheet that has been lined with wax paper.
Freeze the truffle balls for 15-20 minutes.
Melt the white chocolate in a double boiler or in the microwave.
Using a fork, dip the truffle balls in the chocolate, coating them completely. Allow the chocolate to drip off and place the truffle back on the wax paper.
While the chocolate is still wet, sprinkle the tops with the remaining chopped pecans. Allow the While the chocolate is still wet, sprinkle the tops with the remaining chopped pecans.
Allow the chocolate to set and store the truffles in an airtight container in the refrigerator.