PREHEAT oven to 325° F. Spray 9-inch tart pan or springform pan with nonstick cooking spray.
MICROWAVE morsels in small, uncovered, microwave-safe bowl on HIGH (100%) power for 1 minute; STIR. Morsels may retain some of their original shape. If necessary, microwave at additional 10- to 15-second intervals, stirring just until smooth. Cool slightly.
BEAT butter in large mixer bowl until creamy. Beat in brown sugar until incorporated. Beat in melted morsels. Gradually beat in flour and cinnamon until blended. Stir in Raisinets (mixture will be crumbly).
PRESS dough onto bottom of prepared tart pan, pushing down firmly and into side of pan.
BAKE on the center rack of oven for 20 minutes or until set (center should slightly puff up). Immediately sprinkle with granulated sugar. Cool in pan on wire rack for 10 minutes. Remove rim of pan; cut into wedges. Cool completely. Store in airtight container.
VARIATION: For an orange twist, beat 1/2 teaspoon orange extract with butter and brown sugar, and then proceed with recipe.