Microwave Rocky Road Brownie Dessert

1 cup walnut halves, toasted
3/4 cup of all-purpose flour
1 1/2 tsp baking powder
1/4 tsp salt
3/4 cup butter
4 oz unsweetened chocolate
1 1/2 cups sugar
3 eggs
16 large marshmallows
20 milk chocolate kisses , unwrapped

-Coarsely chop walnuts (set aside)
-Combine flour, baking powder and salt (set aside)
-Cut butter into pieces and chop unsweetened chocolate; place butter and unsweetened chocolate into a microwaveable bowl uncovered for 1-2 minutes until mostly melted, stirring every 30 seconds.
-Add sugar and eggs to chocolate mixture; whisk until smooth.
-Fold in flour mixture and add 1/2 cup of the walnuts.
-Pour batter into glass dish (9X12...or 8X8- may need to cook longer)
-Microwave, uncovered on high 5-7 minutes or until toothpick inserted in the center comes out clean
-While it is cooking in the microwave, cut marshmallowS in half- top brownie with marshmallowS, chocolate kisses and remainIing 1/2 cup of walnuts. Microwave COVERED on high 1-2 minutes or until marshmallows start to soften.
-Let stand covered for 5 minutes.
*May serve with ice cream*
**I don't like walnuts so I don't use them