| 1 |
FOR CRUST: Preheat oven to 350 F. Butter 9x9x2-inch metal cake pan. Using electric mixer, beat butter, sugar, and egg yolk in bowl to blend. Add flour and salt; beat until moist clumps form. Gather dough together. Press dough over bottom and 1/2 inch up sides of pan. Bake crust until golden, about 20 minutes. Cool. |
| 2 |
FOR FILLING: Combine first 4 ingredients in medium saucepan. Bring to boil, stirring until butter melts and mixture is smooth. Boil filling 30 seconds. Remove from heat; mix in vanilla, then nuts. |
| 3 |
Pour hot filling into crust. Bake bars until filling is bubbling in center, about 15 minutes. Cool bars completely in pan on rack (filling will become firm). Chill at least 1 hour and up to 2 hours. Cut into 30 bars. |
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