Must've been the coffee...

So.... This morning we baked some cookies. They're not the best. They remain "cooling" on the counter. Then I brewed some coffee. For lunch I baked a lasagna. All was well. This evening I went out to get some groceries. When I came home the house had a familiar scent. The odours from the baking and brewing had combined to make the house smell like a Church Hall. How odd. For a moment I expected to see an out-of-tune piano up against one wall, ;-)

What can I make the house smell like next?