3 ¼ cups all purpose flour
½ cup sugar
1 tablespoon plus 1 teaspoon baking powder
¼ teaspoon salt
1 cup semi-sweet chocolate chips
½ cup English toffee bits (chocolate-covered or not)
½ cup walnuts, toasted (optional)
2 cups chilled whipping cream
2 tablespoons (¼ stick) unsalted butter, melted
Preheat oven to 375 degrees. Lightly butter two heavy, large baking sheets. Combine flour, ½ cup sugar, baking powder and salt in large bowl. Stir in chocolate chips, toffee bits and nuts (if using). Beat cream in another large bowl until stiff peaks form. Fold whipped cream into dry ingredients. Turn dough out onto lightly floured surface. Knead gently until soft dough forms (about 2 minutes), Form dough into ball; pat out to form 1 ¼ -inch-thick round. Cut dough into 12 wedges.
Transfer wedges to prepared baking sheets, spacing apart. Brush with melted butter. Sprinkle with additional sugar. Bake until golden brown, about 20 minutes. Serve warm.