Step 1: Gather Ingredients; Prepare Chicken
1-1.5 lbs. chicken breasts, or tenders, trimmed, pounded to an even thickness, and seasoned with salt and pepper. Refrigerate until ready to use.
Step 2: Prepare Vegetables
8 oz. whole cremini mushrooms, cleaned, stems discarded, quartered if larger, halved if smaller
8 oz. sliced (pre-washed) white button mushrooms, cut into even sized pieces
2-3 shallots, diced (about 3/4 cup)
2-4 garlic cloves, minced (about 2 tsp.)
Step 3: Start Cooking
1 Tbsp. olive oil
2 Tbsp. unsalted butter
prepped mushrooms, shallots, and garlic
2-4 Tbsp. flour
1 1/2 cups Madeira wine
2 cups veal stock (if unavailable use 1 cup each chicken and beef stock)
1/2 cup heavy whipping cream
Salt and pepper
Heat 1 Tbsp. olive oil in a large skillet over medium-high heat. Sauté chicken until well browned and cooked through, about 2-4 minutes per side depending on size of chicken. Transfer to a plate and tent with foil.
Add 2 Tbsp. butter to now-empty skillet, turn heat down to medium. Add mushrooms in an even layer and don't touch for a minute or two until juices start releasing. Add shallots, 1 tsp. salt and 1/4 tsp. pepper to pan, mix well. Sauté until most of the liquid evaporates and mushrooms and shallots are well browned 6-8 minutes. Add garlic, cook about 30 seconds until garlic is fragrant.
Add flour to pan, starting with 2 Tbsp. mix well, if there is still liquid in pan, add up to 2 Tbsp. more flour until vegetables are well coated, cook about 1 minute.
Add Madeira wine, bring to simmer and scrape off all browned bits from bottom of pan. Add stock, continue to simmer on medium-low heat, stirring occassionally, until liquid is reduced by about 1/2, 10-15 minutes.
When sauce is reduced, add in heavy cream, stir to combine.
Step 4: Cook Pasta, Finish Sauce
Cut chicken into bite-sized pieces and add, along with any juices, to sauce.
Step 5: Combine and Mangia!
Stir well and cook a few minutes until pasta is well coated, if sauce seems too thick, add some pasta cooking water to thin it out.
Serve, topping with Parmesan cheese, if desired.