Danish Kringle

Ingredients

• For the dough:
• 2 1/4 teaspoons (1 package) rapid rise yeast
• 1/4 cup warm water
• 2 1/2 cups all-purpose flour (plus additional for rolling)
• 3 tablespoons sugar
• 1/2 teaspoon salt
• 1/2 cup unsalted butter, frozen
• 1/2 cup milk
• 1 large egg
• For the filling, assembly, and glaze:
• For the filling:
• 1/4 cup unsalted butter
• 1 1/4 cups walnuts or pecans, finely chopped
• 1/4 cup maple syrup (Grade B if you've got it)
• 1/4 cup sour cream or creme fraiche
• 1 teaspoon lemon juice
• 1/8 teaspoon salt
• +++++++++++++++++++++++++
• For the glaze:
• 2/3 cup powdered sugar
• 1/4 cup sour cream or creme fraiche
• 1/2 teaspoon vanilla extract
• 1/2 teaspoon lemon juice
• 1 to 4 teaspoons milk (if needed, for thinning glaze)