Beamer subfig captions without prefixes

Question

I am using the subfig package in Beamer to stack two images on top of each other. I'm using \captionsetup[subfigure]{labelformat=empty} to get rid of the figure prefixes, but I am having trouble adding captions. My goal is two images (stacked, not side-by-side), with a caption under each image, but no prefix ("(a)") on the captions.

I'm trying to follow the example in Section 5.3 in the subfig docs, and here are the troubles I am having:

Here, the caption is split across two lines (and the second caption is gone, probably off the slide?). I also would like the images closer together (\label{fig:a}} \vspace{1em} does not change the output).

\usepackage{caption}
\captionsetup{labelformat=empty,labelsep=none}
\captionsetup[subfigure]{labelformat=empty}
\usepackage{fancybox}
\usepackage{subfig}

\begin{document}
\begin{frame}

\begin{figure}
\centering
\subfloat[][]{\includegraphics[height=3cm]{C:/Users/me/Desktop/Capture.jpg} 
\label{fig:a}} 
\caption look at dis face \\
\subfloat[][]{\includegraphics[height=3cm]{C:/Users/me/Desktop/Capture.jpg} 
\label{fig:b}} 
\caption feed me
\end{figure}

\end{frame}
\end{document}

And in this effort, the prefixes are back and the caption is on the bottom. I am trying for something like the first effort above, with a caption under each figure.

\begin{frame}

\begin{figure}
\centering
\subfloat[][]{\includegraphics[height=3cm]{C:/Users/me/Desktop/Capture.jpg} 
\label{fig:a}} \\
\subfloat[][]{\includegraphics[height=3cm]{C:/Users/me/Desktop/Capture.jpg} 
\label{fig:b}} 
\caption[]{ \subref{fig:a} look at dis face \subref{fig:b} feed me}
\end{figure}

\end{frame}

Answer 1

Like the following image?

With \subcaptionbox defined in the subcaption package:

\documentclass{beamer}
\setbeamerfont{subcaption}{size=\tiny}
\usepackage{subcaption}
\captionsetup[subfigure]{skip=0.5ex, labelformat=empty}

\begin{document}
\begin{frame}

\begin{figure}
\centering
\subcaptionbox{look at dis face}{\includegraphics[height=3cm]{example-image-duck}}

\subcaptionbox{feed me}{\includegraphics[height=3cm]{example-image-duck}}
\end{figure}

\end{frame}
\end{document}