1/2 c milk, scalded & cooled to lukewarm (105 to 115 F.) .
1/4 c sugar, divided .
1 c confectioners' sugar .
1 c unsalted butter, chilled & cut into pieces (2 sticks) .
2 1/2 c all-purpose flour .
1/2 c sugar .
1/2 c sliced walnuts .
CINNAMON NUT FILLING .
2-3 tsps cream or milk .
2 3/4 tsps active dry yeast (1 package) .
1 tsp ground cinnamon .
1 tsp vanilla .
ICING .
1/2 tsp salt .
1/4 c unsalted butter, melted .
1 large egg, lightly beaten
Directions
Step #1 In a small bowl, mix the milk, yeast, & 1 tbsp of the sugar.
Step #2 Let stand for 5 mins until the yeast foams.
Step #3 Whisk in the salt & egg.
Step #4 Set aside.
Step #5 Measure the flour into a large mixing bowl or into the work bowl of a food processor/blender.
Step #6 Cut the butter into the flour until the mixture resembles coarse crumbs.
Step #7 Pour the liquid ingredients over the flour mixture.
Step #8 Mix lightly with a fork or use short pulses if using the food processor/blender, until the flour is just moistened.
Step #9 Cover up with plastic wrap & put in the fridge at least 4 hrs or up to 2 days.
Step #10 When you’re ready to shape the cake (you can shape the coffee cake, put in the fridge overnight, cover, & bake it in the morning; or you can shape it, let it rise, & then bake it), remove the dough from the refrigerator.
Step #11 Lightly grease a baking sheet or cover with parchment paper.
Step #12 Turn the dough out onto a lightly floured surface & roll it out to make a 15 inch circle about 1/3 inch thick.
Step #13 To fill the cake, brush with the melted butter.
Step #14 Mix the sugar & cinnamon in a small bowl & sprinkle it over the dough.
Step #15 Sprinkle top with the nuts.
Step #16 Roll up jelly roll fashion.
Step #17 Place on the prepared baking sheet.
Step #18 Fold the roll in half so that one half is on top of the other.
Step #19 Seal the open ends together.
Step #20 With a sharp knife, make a cut from the folded end lengthwise down the center of the roll, cutting from the top roll through to the bottom to within 2 inches of the sealed end.
Step #21 In so doing the folded end of the roll will separate out to form the two lobes of a heart shape.
Step #22 Spread out the two sides to expose the filling.
Step #23 Let rise, until puffy, lightly covered, about 45 mins, or cover & put in the fridge over night.
Step #24 If put in the fridged, remove this from the refrigerator 1 hr before baking so that the coffee cake can rise & come to about room temp.
Step #25 Preheat the oven to 375°F Bake for 20 to 25 mins until light brown.
Step #26 Remove & cool on a wire rack.
Step #27 In a small bowl, mix the icing ingredients.